Add initial changelog

CHANGELOG.md

+Changelog
+=========
+
+v4.3.0
+------
+
+
+v4.2.0
+------
+
+**Library:**
+- Add Runge-Kutta SSP schemes for 2nd/3rd order using keys `RungeKutta2_SSP` and
+  `RungeKutta3_SSP`. `ClassicalRungeKutta4` is now called `RungeKutta4`. (!481)
+- Add rudimentary support for 3D CAD models using OpenCascade - work in progress
+  (!486)
+- Allow filters to evaluate expressions in their parameter definitions (!489)
+- Fix block preconditioner to work with periodic boundary conditions (!420)
+- Dump a backtrace when crash occurs and Nektar++ is compiled in FullDebug mode
+  (!495)
+- Stop the execution of a time-dependent solver if NaN is detected in the
+  solution field (!496)
+- Fixes to improve robustness of interpolation routines (!499)
+- Allow solvers to use multi-level static condensation with Xxt, most useful
+  when running a 3DH1D simulation (!502)
+
+**IncNavierStokesSolver:**
+- Various fixes for the coupled stability solver (!508)
+
+**MeshConvert:**
+- Add module to extract prismatic boundary layer elements from mixed prism-tet
+  mesh (!493).
+
+**FieldConvert:**
+- Add a processing module to calculate height of an element connected to a
+  surface, allowing for calculation of y plus values (!488)
+- Fixes for equispaced output (!510)
+
+
+v4.1.0
+------
+
+**Library:**
+- Add support for interpolating point data from .pts files (!433)
+- Fixes for curvilinear element normals (!443)
+- Fix consistency issues between FFT and MVM approaches for homogeneous
+  expansions (!444)
+- Fix a bug in Tecplot output (!445)
+- Fix a bug with PETSc and MPI_Finalize (!456)
+- Fix bugs with mesh partitioning (!449, !480)
+- Fix a bug with non-symmetric SVV parameters for curvilinear elements (!451)
+- Fix detection of Intel MKL 2013/2015 (453)
+- Fix linearised stability solver in parallel (!454)
+- Add a filter for 1D energy spectra (!457)
+- Add an incomplete developer guide containing most information from the wiki
+  (!459)
+- Change user defined boundary conditions to remove dependency on enumerator
+  inside SpatialDomains (!460)
+- Add a new collections library for optimised evaluation of operators (!461)
+- Change minimum version of boost to 1.52.
+- Add initial multithreading support (!463)
+- Fix third-party boost compilation on OS X (!467)
+- Disable some regression tests on 32-bit systems (!468)
+- Fix memory issues inside collections (!473)
+- Fix collections autotuning (!476)
+- Fix VtkToPng utility (!477)
+- Add PulseWaveSolver to packaging (!478)
+- Fix bug in iterative static condensation solver (!483)
+- Fix zlib install path on OS X (!484)
+- Fix documentation HTML styling for user and developer guide (!485)
+- Add fixes to support native Nektar++ extension in VisIt visulisation software
+  (!490)
+- Fix warnings on OS X (!491)
+
+**CardiacEPSolver:**
+- Fixes for stimuli (!442, !446), conductivity (!441), cell restarts (!458)
+- Add a new filter for outputting cell states at specific points over time (!465)
+
+**Linear elastic solver (new):**
+- Add solver for linear elasticity equations (!400)
+
+**IncNavierStokesSolver:**
+- Add support for moving bodies (!344, !448)
+- Fixes for modal energy filter (!427)
+- Fix import of mesh file in the Adaptive SFD driver (!440) and other general
+  fixes (!452)
+- Documentation for high order pressure and outflow boundary conditions (!447)
+- Update examples to use correct forcing terms (!470)
+- Fixes for half-mode stability (!471)
+- Fix static initialisation problem in extrapolation classes (!492)
+
+**CompressibleFlowSolver:**
+- Add support for sponge region (!396)
+- Add support for adiabiatic walls (!430)
+- Add utility to generate boundary layer from similarity solution (!438)
+
+**ShallowWaterSolver:**
+- Added a DG solver for the Boussinesq equations of Peregrine (!431)
+
+**APESolver:**
+- Add support for variable speed of sound (!438)
+
+**MeshConvert:**
+- Fix Star file input for highly stretched elements (!455)
+- Add Star input from binary format (!474)
+- Tidy up files to align with FieldConvert (!479)
+
+**FieldConvert:**
+- Major re-organisation of modules, most post-processing utilities now available
+  within FieldConvert (!475)
+
+v4.0.1
+------
+
+
+
+v4.0.0
+------
+
+
+
+v3.4.0
+------
+
+**Library:**
+- New parallel output format. Parallel files are now stored in directories which
+  contain partition information. (!100, !102, !236, !242, !249, !256).
+- gzip-compressed XML mesh files are now supported with extension .xml.gz (!116,
+  !140, !186).
+- HDG solvers now run in parallel and have post-processing utilities (!188,
+  !230).
+- Partitioning can be done only on root process if shared filesystem is
+  present with use of `--shared-filesystem` command line option (!220, !250).
+- A variety of preconditioners are now supported, including linear space and
+  low-energy preconditioning (!148).
+- Many changes to geometric factors storage and interpolation (!99, !197).
+- Improvements to identification of invalid elements (!208, !227).
+- Removed elemental storage to reduce memory consumption by 30-50% for large
+  problems (!240).
+- Various performance and design improvements for discontinuous formulation (!134).
+- Periodic boundary conditions are supported in 3D for both continuous and
+  discontinuous formulations (!139, !150, !152, !155, !196).
+- Utilities added to mesh converter to help identify pairs of periodic faces
+  (!214).
+- Preconditioner support for periodic boundary conditions (!231, !239).
+- New radiation boundary condition type (!74).
+- Some solvers (compressible flow solver, advection-diffusion-reaction solver)
+  now support dealiasing options (!78, !146, !167).
+- BLAS and vectorisation performance improvements for static-condensed iterative
+  solver (!86, !109).
+- New driver to improve steady state convergence and add parallel support (!91,
+  !235).
+- Updated to METIS v5.1.0 (!97, !142, !189).
+- Iterative solvers now use previous timestep (when available) to improve
+  convergence speed (!106).
+- Added CPU timing for timestep loop (!156).
+- Added provenance information (date, time, code version, git revision, etc) to
+  field file output (!179).
+- Disabled long-running regression tests by default (!183).
+- Support for command line arguments without parameters (!187).
+- Added support for reading boundary conditions from files, and appropriate
+  utilities in MeshConvert to extract surfaces (!226).
+- Updated XXt and Gs libraries to latest version (!232).
+- Fix singularity check for Poisson equations (!74, !154).
+- Fixes for 2D Gauss points (!73, !149, !157).
+- Fixes to parallel I/O (!77, !218, !264).
+- Fixes for parallel implementation (!93, !107, !121, !169, !217, !245, !246).
+- Fixes for normal calculation (!94, !135).
+- Improved compilation techniques, particularly when compiler includes MPI
+  automatically (!80, !82, !84, !85, !113, !114, !131, !141, !166, !210, !241).
+- Updated zlib to v1.2.7 (!115).
+- Fix for boost 1.5.3 compilation (!120).
+- Most compiler warnings silenced with clang/gcc (!81, !92, !103, !123, !201,
+  !243).
+- Attempts to improve mesh partitioning/load balancing (!160, !170, !175).
+- Fixes for Newton iteration to interpolate inside deformed elements (!216,
+  !251).
+- Fixed curved tetrahedron and hexahedron issue (!219, !248).
+- Fixed reading of field files for tetrahedron (!228).
+- Fixed uninitialised variable inside SessionrReader (!233).
+- Various improvements to support use of Nektar++ externally (!111, !260, !261).
+- Fixed base flow reading (!112).
+
+**CardiacEPSolver:**
+- Cardiac electrophysiology solver improvements (!87, !95, !96, !108, !119,
+  !165, !173, !174, !199, !222).
+
+**CompressibleFlowSolver:**
+- Compressible Navier-Stokes equations are now available for both DG and FR
+  discretisations (!110, !125, !128).
+- Meshes with spatially varying p in both 2D and 3D are now supported (!158).
+- Homogeneous Fourier extension is now supported (!180).
+- Various fixes (!90, !98, !147, !172).
+
+**DiffusionSolver (new):**
+- Added small solver to demonstrate usage of higher library levels outside of
+  EquationSystem (!225).
+
+**IncNavierStokesSolver:**
+- Major refactoring of time-integration classes (!181, !184).
+- Summary information now generated via callbacks (!182).
+- Implemented new generic forcing function classes (!194).
+- Current time now written out in field files (!198).
+- Major refactoring of incompressible Navier-Stokes solver to improve
+  readability and performance (212, !213).
+- Spectral vanishing viscosity for stabilisation (!101, !104, !211, !263).
+- Added filter to compute aerodynamic forces on surfaces (!168, !203, !204).
+- Added filter to compute kinetic energy and enstrophy (!207, !257).
+
+**ShallowWaterSolver:**
+- Various improvements/modernisations to shallow water solver (!190).
+
+**Utilities:**
+- VTK to PNG converter (!122)
+- Added scalar gradient utility (!129, !252).
+- Added utility to calculate Q-criterion field (!153).
+- Added support to XmlToVtk to write Jacobian field (!223).
+- Added utility to calculate wall shear stress (!224).
+- Fixed vorticity calculator (!138).
+
+**MeshConvert:**
+- Added face-interior quadrature and 2D/3D manifold support to spherigon code
+  (!130).
+- Fixes for boundary layer refinement and prism-to-tetrahedron splitting (!137,
+  !202, !206, !244).
+
+**FieldConvert (new):**
+- Added new FieldConvert utility which will eventually encompass most existing
+  utilities (!255).