Fix prism output up to order 4 (but no higher right now), fix the use of face IDs for generic 3D elements

Update NekMesh linearise module

This MR updates the linearise if invalid command so that all element and curvature types can be processed. Additionally, it will recursively sweep through neighbours so that the module does not need to be run more than once to get rid of all invalid elements.

See merge request !659

Add projection equation system to ADRSolver

This MR adds a projection operator to the ADRSolver, which can be used to impose C^0 connectivity on an input forcing field and is useful in e.g. the creation of boundary conditions on complex geometries.

See merge request !675

Add regression test, some verbose information and fix incorrect functionality in the Tester regex module.

Fix Gslib verbose output

This MR updates the version of gsmpi to fix the suppression of autotuning timings output unless the `--verbose` flag is set. There are then some modifications throughout the code to enable the use of the verbose flag.

See merge request !652

Performance fix for ExtractDataToCoeffs

This MR fixes a significant performance issue in `ExpList::v_ExtractDataToCoeffs` when post-processing large simulations. This function is called once for each field definition that is present in the input file.  Presently, this function constructs a `std::map` from geometry IDs to their location inside `m_exp`. When post-processing large simulations, where there is generally one field definition per processor in the input file, this function therefore consumes a huge amount of extraneous CPU time.

This has been fixed by adding a new member variable to hold a `boost::unordered_map` which is significantly faster in lookup and population speeds. This is populated on the first call of `v_ExtractDataToCoeffs`. Runtime of the FieldConvert InputFld module for a 700k tet mesh reduced from ~520s to ~6s.

See merge request !672

fix insert surface

Extremely minor fix to a merge from last week

See merge request !673