Correct linking error caused by  -lrt on OS X when using Cmake
Link automatically to the CUDA framework on OS X

This removes the need to manually add the CUDA framework in Xcode as per the Readme.md file
Removed instructions to manually change the 'loading flags' from the OS X Xcode section

The CUDA frameworks are now included automatically by CMake
Merge commit '6948459b879b1c93ee5f5a3668d588216eb95e9b'

Conflicts:
	CMakeLists.txt
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
Freed dynamically allocated memory for matrices
Merge remote-tracking branch 'upstream/master'
Revised the OS X section of README.md
Merge remote-tracking branch 'upstream/master'