Use File.exist? instead of File.exists?

File.exists? is deprecated in Ruby 2.1+.
ASL: option to build Matlab interface.
Bump gal-sim to release 1.1.0

Closes #960.
cube: Fails to build with clang

Undefined symbols for architecture x86_64:
"cube::Cube::def_mirror(std::string const&)", referenced from:
MainWidget::readFile(QString) in cube-MainWidget.o
R: Fix head build.

Closes #405.
blasr: Specify the path to hdf5

Closes #932
sundials: add features

- add serial tests for C bindings
- add patches from mailing list since 2.5.0 release
- add openblas support
- add Fortran support
- add serial Fortran tests
- add mpi support
- add parallel tests for C bindings
- add parallel tests for Fortran bindings
- add patches (submitted upstream) to fix additioanl bugs
- add Argonne PETSc project mirror