Cleanup in webgl code

-changed uniforms to consts in shaders
-changed loop counter to int to avoid floating point troubles
-cleanup
Optimized webgl code

-minimized texture reads by removing a loop in the patch shader
-minimized texture reads in sobel shader
Removing antialias in webgl

-Unnecessary antialising causing bugs in some browsers
-rebuilt clmtrackr.js
Removing antialias in sobel webgl

Forgot to remove antialias in sobel webgl code as well