I pushed a new version of Jo Engine with some features for XL2 and Null1024

In this version you can see that I'm working to remove the SGL (Only stable features is in the release)
My remaining roadmap (major todolist) to remove the SGL is the following:
- Z-buffer (and sorting) implementation
- Matrix & math functions (needed for 3D)
- 3D implementation
- DMA copy
- SEGA FileSystem implementation
- Audio implementation with new driver
- Finish input implementation