[CMAKE]

[CMAKE]
- Add add_target_property macro and add wrapper macros to easily set important properties
- This makes macros more consistent, follows CMake property names, favors per-target instead of per-directory property settings and favors adding to properties instead of replacing them
- Convert the global settings to use the new add_compile_flags and add_target_link_flags - no functional change
- Fix add_importlibs to add to compile definitions instead of replacing them
- Big thanks to Amine

svn path=/trunk/; revision=53545