(Only the first 10 of 18 ports in this commit are shown above. )
- Update math/freemat to version 4.2 and clean up the port.
- Support JIT compilation using Clang/LLVM 3.3.
- Add desktop entry.
- Remove math/freemat-mpi. It has been marked IGNORE for almost 7 years
since the removal of MPI support in FreeMat 3.0.