Update TODO.txt

Mouse capturing has been implemented. Thank you!

TODO.txt

@@ -1,4 +1,3 @@
-// - mouse cursor hiding/capturing
 // - increase DoF resolution
 // - further gaussian blur of high-res DoF targets to approximate intended degree of sharpness
 // - screen-space ambient occlusion using existing z data (rendertexture #3 after first pass!)
@@ -40,4 +39,4 @@
 ========= Cleanup
 - move Effect compilation to base class, with nice wrapper for setting defines
 - split texture handling part of renderstate manager into separate texture manager
-- create some kind of generic interface for the detection of different positions in the renderpipeling, use in renderstate manager
+- create some kind of generic interface for the detection of different positions in the renderpipeling, use in renderstate manager