Added doc to help devs work with CMake.  Fixed a couple of CMake utility functions to match naming convention.
Merge pull request #186 from Fraser999/MAID-603

Added doc to help devs work with CMake.  Fixed a couple of CMake utility...
Merge branch 'next' of https://github.com/maidsafe/MaidSafe into next
Merge remote-tracking branch 'origin/next' into next_ned14