Created CMake build system for building CasparCG Server. To build:

Created CMake build system for building CasparCG Server. To build:

1. Install CMake
2. Create a folder called build in the root.
3. With the build folder as working directory write:
   cmake -A x64 -G "Visual Studio 12 2013" ..
4. Open build/CasparCG Server.sln