now dealing with TextFields that have a zero area (closes #393)
now allowing to suspend rendering when Starling is stopped.

This makes it possible to use Starling in AIR apps that support background execution (coming in AIR 3.9).
now stopping rendering in DEACTIVATE event in samples
now suspending rendering in internal 'stop' calls
... that was one too much ;-)
added (starling_internal) ability to manually restore ConcreteTexture.base (closes #386)
removed protected 'queue' and 'currentTouches' properties in TouchProcessor, and made the ivars protected instead
added 'purgeQueue' method that empties the queue and stops all pending load operations (closes #395)
added documentation for Event.TEXTURES_RESTORED to AssetManager
updated XML comments
updated changelog for 1.4 release
updated starling.swc for 1.4 release
asset manager now supports all file extensions, detecting type automatically
new compilation for v1.4, including last AssetManager change
small documentation update; removed obsolete variable
added AssetManager.queueLength property, made 'queue' accessible via protected property (closes #399)
renamed 'queueLength' to 'numQueuedAssets' for consistency (refs #399)
small internal naming change for consistency
fixed unreliable clipRect when it was outside the stage bounds (closes #396)
fixed error in 'loadQueue' when 'purgeQueue' was called during active timeout (closes #403)