Add support for cmake 3.0 change to clang compiler ids.
remove cmb requirement. Branch hasn't been compiled to verify it works.
Enable reader to be used by CMB or ParaView

Add a CMake option to let the user decide on which
project it should depends on. [CMB or ParaView]

Add also the FindNetcdf to gain some freedom on the definition
of the library location. Specially useful when NetCDF was
installed using Homebrew.
Merge branch 'no_cmb_requirement'