Cleanup

Merge pull request armory3d#124 from N8n5h/light-fix-2

Fix using incorrect bias matrix on webgl without shadow map atlasing

Merge pull request armory3d#120 from N8n5h/light-fix

Make uniforms for sun shadowmap calculation no longer rely on manual setup.

Add note to stream functions

Ensure render target entry exists

Improve shader loading

Improve shader loading

Merge pull request armory3d#106 from knowledgenude/master

Update Tilesheet.hx

Add particle system pause and resume

Allow reading depth via external texture link