[FIX] Skin shader compilation for Mali 450 MP

Merge pull request playcanvas#547 from guycalledfrank/shbrightness

Fix generating SHs from sRGB cubemaps

Merge pull request playcanvas#545 from guycalledfrank/tempnosh

Fix various LM stuff (mostly for android)

[FIX] Cloning sound components

[FIX] Check for existing query parameters before appending timestamp

fix trigger not synced to entity after being enabled

[FIX] Fix skinned shader compilation for non-bone texture path

fix model cloning bug

Merge branch 'master' of github.com:playcanvas/engine

Optimize out called to clientWidth/clientHeight.