Add an optional append/prepend param to addChild.
Add MovieSprite.looped.
Ignore haxelib install failures.

This seems to only happen sometimes during the post-install network
request that updates the download count. The install still works in that
case, so press on.
Entity shouldn't be subclassed.
BitmapData renderer is no more.
Pull the quad transformation out into a function.
Switch to Haxe 3 property syntax.

Things are still Haxe 2 compatible for now, but a future release will
require Haxe 3.
Enable Scout (Monocle) profiling in debug builds.
AirWeb fix.
Flump bitmap rects are always integers.
Prevent double tap zooming in IE10.

Haven't tested this on an actual touch device yet, but it should fix
things.
Derp, didn't mean to push that.
Add an optional defaultValue param to Storage.get().
Comment tweak.
Handle format changes in the next version of Flump.
Add Manifest.relativeBasePath and externalBasePath.

Allows finer run-time control of where assets are loaded from.
Remove the asset_base build option.
First pass at particle systems.

Part of #61.
Radial and tangential particle acceleration.
Only gravity-type emitters are supported for now.