ENH: Added platform settings CMAKE_FIND_LIBRARY_PREFIXES and CMAKE_FIND_LIBRARY_SUFFIXES to allow customized searching for libraries.

ENH: Picking better default for CMAKE_INSTALL_PREFIX on Windows by using ProgramFiles environment variable.  Now that install actually works on Windows I'm making this entry non-advanced also.

ENH: Added better default install location for windows builds.  The previous default /usr/local did not make much sense.  Now "%SystemDrive%/Program Files/PROJECT_NAME" is used, which is the windows equivalent to /usr/local.

ENH: more uniform approach to enable language, one step closer to being able to enable a language without modifing cmake source code