* Improve Buffer Textures and flush Image Stores
Fixes a number of issues with buffer textures:
- Reworked Buffer Textures to create their buffers in the TextureManager, then bind them with the BufferManager later.
- Fixes an issue where a buffer texture's buffer could be invalidated after it is bound, but before use.
- Fixed width unpacking for large buffer textures. The width is now 32-bit rather than 16.
- Force buffer textures to be rebound whenever any buffer is created, as using the handle id wasn't reliable, and the cost of binding isn't too high.
Fixes vertex explosions and flickering animations in UE4 games.
* Set ImageStore flag... for ImageStore.
* Check the offset and size.
* shader cache: Fix invalid virtual address clean up
This fix an issue causing the virtual address of texture descriptors to
not be cleaned up when caching and instead cleaning texture format and swizzle.
This should fix duplicate high duplication in the cache for certain
games and possible texture corruption issues.
**THIS WILL INVALIDATE ALL SHADER CACHE LEVELS CONSIDERING THE NATURE OF THE ISSUE**
* shader cache: Address gdk's comment
Here come Salieri, my implementation of a disk shader cache!
"I'm sure you know why I named it that."
"It doesn't really mean anything."
This implementation collects shaders at runtime and cache them to be later compiled when starting a game.
