Add more Project Templates

[RobLoach]

Right now, there's only a CMake project template:
https://github.com/RobLoach/raylib-cpp/tree/master/projects

Would be awesome to add more.

[RobLoach]

Would be nice to have Visual Sudio project files.

[blendjam]

When is Visual Studio project files comming?

[RobLoach]

When someone adds them 😉 I don't have Visual Studio, but would love the additions.

[RobLoach]

To use it in VS, however, you could load the Raylib project, set it as C++ project, and then #include "path/to/raylib-cpp/include/raylib-cpp.hpp"