Updated docs for pc.GraphNode#find

Remove extra comma

[FIX] Fix image elements losing user assigned material on screen resize

[FIX] Ambient light no longer affects element components

Update README.md (playcanvas#991)

Fix docs typo

Fix version number in stable

Fix typo in comment. (playcanvas#972)

Fix typo in comment. (playcanvas#967)

use drawOrder when sorting draw calls for picker (playcanvas#964)