added empty texture to sprite

also fixed canvas draw issue
Merge branch 'dev' of https://github.com/GoodBoyDigital/pixi.js into dev
correct measurement for accents in text (eg. É)
-[HOUSEKEEPING] Removed extra space.
Merge branch 'dev' of github.com:GoodBoyDigital/pixi.js into Trompo-SpineUpdate
-[HOUSEKEEPING] Removed extra semicolon.
Merge branch 'Trompo-SpineUpdate' of github.com:TrompoGames/pixi.js into trompo-dev