cppgraphics 1.0.1

• Template project for Windows was separated so there is a distinct template for each MSVC version. CMake's heuristics for detecting the generator seem not to be reliable.
• All rendered triangles are now back-culled, which removes artifacts sometimes present (e.g. dots inside a filled circle). Triangles drawn by cg::triangle and cg::triangle_blend are reoriented if needed, the function remains orientation-independent.