default to shared linkage on MacOSX to avoid linker issues from
configure/cmake library detection differences
link/depend on GSL and LAPACK explicitly only for static linkage
This remove the CMake configuration of several larger packages and places
it into their own files in the Modules/Packages folder.
- COMPRESS
- KIM
- LATTE
- MESSAGE
- MSCG
- USER-MOLFILE
- USER-NETCDF
- USER-PLUMED
- USER-QMMM
- USER-QUIP
- USER-SCAFACOS
- USER-SMD
- USER-VTK