* Move GPU LLE emulation from HLE to Graphics
* Graphics: Move Gal/Texture to Texture
* Remove Engines/ directory and namespace
* Use tables for image formats
* Abstract OpCode decoding
* Simplify image table
* Do not leak Read* symbols in TextureReader
* Fixups
* Rename IGalFrameBuffer -> IGalRenderTarget
* Remove MaxBpp hardcoded value
* Change yet again texture data and add G8R8 flipping
* Rename GalFrameBufferFormat to GalSurfaceFormat
* Unident EnsureSetup in ImageHandler
* Add IsCompressed
* Address some feedback
* Call OpenGL functions directly, remove the pfifo thread, some refactoring
* Fix PerformanceStatistics calculating the wrong host fps, remove wait event on PFIFO as this wasn't exactly was causing the freezes (may replace with an exception later)
* Organized the Gpu folder a bit more, renamed a few things, address PR feedback
* Make PerformanceStatistics thread safe
* Remove unused constant
* Use unlimited update rate for better pref
* Initial implementation of the texture cache
* Cache vertex and index data aswell, some cleanup
* Improve handling of the cache by storing cached ranges on a list for each page
* Delete old data from the caches automatically, ensure that the cache is cleaned when the mapping/size changes, and some general cleanup
