Added some magic into targets.
Added some magic into targets.

  Added the ability to find files for specific CMake targets, can get all of
  the CMake targets available in a project ( like all of the them, CTest's
  targets and what not). This paves the way for a lot more function like
  per-file flag injection and specific target building. Let's go!

jalcine/cmake.vim,jalcine/cmake.vim