Fix OS X source packaging, add PackageMaker generator to create installer, rename LICENSE -> LICENSE.txt to keep PackageMaker happy

Extend SurfDistance module of FieldConvert to Quad and Hex elements

This MR extends the SurfDistance module of FieldConvert to quadrilateral and hexahedron elements.

I tested it with quads and with a simple hex mesh. It would be nice if someone could test it with a mesh with a prism boundary layer.

See merge request !524

Feature/compressed io

Introduced a compression for mesh XML I/O which is 64-bit aligned and declares the endianness of the compressed binary data as an attribute.

See merge request !533

Add change log to repository

This MR adds a `CHANGELOG.md` file with release information from v3.0 onwards from Trac, and the more recent merges from v4.0 onwards.

See merge request !534

Put check for compressed or uncompressed format back into local routines rather than through the API since m_config is accessible within methods.

Add option in FieldConvert to set number of planes for Homogeneous expansion

This branch creates a command line option in FieldConvert to set the number of planes for output of Homogeneous1D expansions.

See merge request !540

Fix bug in C0Projection

This fixes a bug in the C0Projection module of FieldConvert related to the order in which the operations are performed. It is not necessary to perform a BwdTrans at the beginning (since the phys array is already available), but it should be done after the projection in order to update the phys values.

This bug does not cause problems when the output is another .fld file, but when the output is a .vtu file the original solution is being exported.

See merge request !541

Create mean mode module for FieldConvert

This MR creates a module for FieldConvert which extracts the mean mode (plane zero) from a Homogeneous1D expansion.

See merge request !530

Create mean mode module for FieldConvert

This MR creates a module for FieldConvert which extracts the mean mode (plane zero) from a Homogeneous1D expansion.

See merge request !530

Feature/isocontour3dh1d

This MR extends the EquiSpacedOutput and IsoContour modules of FieldConvert to 3DH1D expansions.

See merge request !525

Fix/GetBoundaryToElemtMap3 dh1 d consistency

This MR changes the ordering from DisContField3DHomogeneous1D::GetBoundaryToElmtMap to make it consistent with m_bndCondExpansions (i.e. sorting by boundary, instead of sorting by plane). This allows the boundary expansion from 3DH1D to be treated in the same way as the non-homogeneous case, reducing the need for expansion-specific code.

All parts of the code assuming the old ordering were updated to take these changes into account. 

See merge request !526

Fix bug in ExpList1D

This fixes a bug in ExpList1D which may lead to invalid .vtu files.

See merge request !531

Fix bug in ExpListHomogeneous2D

This fixes a bug which prevents FieldConvert from working with 3DH2D field files.

See merge request !529