Removing drawing/OpenGL knowledge from TexturePacker.
Working on a passable fat line in 2d.
FatLine2d is now FatPath2d.

Since it's not really something across two points.
Expanded line connects two points.

Making it easy to animate the length of the line.
Only draw line if scale > 0.
CinderBlock xml information.

Wrapping VBO in conditional comment to avoid compilation on desktop.
Currently includes a GLES2 header.
Starting to build a simple renderer.

Holds on to drawable objects and displays them in the proper
render order.
Added CollectionUtilities.
Comments documenting what goes on in CollectionUtilities.

Functions for manipulating STL containers in a readable fashion.
Roughing out a basic renderer and some sprite objects to send it.
Added clipBy method to Sprite object.
Trial run of the simple renderer.
Sprite layering and animation testing.
Mouse move for interaction makes it easier to see.
Switch to bare pointers in SimpleRenderer.

Managing relationship between renderer and rendered automatically.
When either one dies, it tells the other to forget about it.
Only update the renderer as needed.
Changed Sprite and SpriteSheet dependencies.

SpriteSheet pulls from Sprite, not the other way around.
Was initially a quirk of the order in which they were created.
Convenience methods for getting renderable Sprites.

SpriteSheet can can back a Sprite or SpriteRef from the name.
Added map_keys to CollectionUtilities, removed from SpriteSheet.
Updated doc comments in SpriteSheet.