oldgen conversion to crossplatform apis for linux.

• Converted old WinAPI invoke ref to shared_ptr
• start using c++11 where possible
• replace windows api with SDL2 were possible, and convert the remaining one (like path api)
• input replaced to SDL2 (dinput joystick+keyboard+mouse)
• todo: replace rendering with bgfx? required work...

oldgen improvements

• Removed DirectX9 SDK distribution (INSTALL DIRECTX SDK INSTEAD!!!!!!)
• Switched to CMake
• Enabled vcpkg support
• Removed all external libraries (Install them with vcpkg)