Increase mutable texture cache duration from 1 seconds to 5; allow duration value to be modified.
Copy image (instead of bounds check)
Texture spacing cleanup for filters
* Texture Atlases with spacing now have the spacing all around the images, not just between images.
* Blur now properly makes sure there is a 1-texel border around scaled-down images.
* Texture API cleanup
Blur: Option to expand image size (default on)