MASA 0.50.0 Release
- updated .gitignore
- bug fix to --enable-fortran-interfaces Makefile.AM including .mod files
- bug fix in navierstokes_3d_incompressible to fix sign error in convection
- bug fix to import/examples/ to fix sign error in convection terms
- Include MetaPhysicL as a third party library, not as a forked copy
- Added unit test to verify divergence(gradient(U)) as a vector laplacian
- Fixed a configuration failure on some versions of OS X