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)
now checking if atlas / bitmap font texture is available (closes #402)
changed anonymous function for FDT compatibility of Scaffold (closes #401)
Merge remote-tracking branch 'upstream/master'