Added another way of drawing to allow advanced usage, no documentatio…

…n for now

Abuse TCO (quick optimization)

Update rendertarget name to be unique, oopsie

Fix shadow drawing with blur being messed up

Merge pull request #6 from Astralcircle/docs

Add missing functions to documentation

Merge pull request #5 from Astralcircle/manualcolor

Allow setting colors not via color objects

Switch back to dual pass blur, which should be good enough perf

Use PowerOfTwoTexture to improve performance for blur even more

Improvements for drawing blur!!

Use jaffies's trick to send params to shader by just 2 C calls, which…

… improves performance by around 30%