[Cmake] Set Libs and Compiler flags acc. to build options

[Wheeler, Fred (Research)]

> From: Nils H. Busch [mailto:nilsb at cns.mpg.de]
> 
> Plus, I have read that SOURCE_FILES is kind of deprecated, 
> but could not
> find out what should be used instead.

I can answer this part.  VXL uses CMake, and in the VXL book (on the web) there is an explaination of
what to use instead of SOURCE_FILES:

http://www.isbe.man.ac.uk/public_vxl_doc/books/vxl/book.html#SEC105

Fred Wheeler