added very rudimentary renderShape functionality
Added new assets
Merge branch 'master' into renderer
renderShape is now useful for drawing rectangles.
Added Tower System  and Attacking System (not yet completely operational)
rendering system can handle multiple renderingComponents on an entity now.
offset in Shape+Image works
RenderShape can fill/not fill
RenderText (primitively) works
Added Attacking
bugfix: destroyed entites remained in PIXI model of world
Added accessors to Rendering Components
Pulling
Merge branch 'master' of github.com:jadmz/CrunchJS into Joe
Added Health bars
bugfix: rendering: dynamically added 3rd renderComponents didn't appear cause the code didnt know to make them
refactor: rendering: processEntity
bugfix: refactoring rendering system introduced bugs.
fix merge