Restructuring update.

- Updated license and readme to fit new information about us.
- Added missing software licenses (zlib and GLFW)
- Renamed Coeus.Bindings.stdio_ to Coeus.Bindings.C. It now contains generic standard C stuff like malloc and free too.
- Moved remaining assets into assets directory, which will go away soon.
- Removed binaries; get those from the releases section.