Sanity checks to prevent negative frameIdx errors
Asynchronous Loading of Images

Changed the imageDecodingPolicy to ON_LOAD, which asynchornously
decodes the image before calling the complete event. This change
improves the responsiveness of the UI while loading flump pacakges.

See Adobe's documentation for more details:
http://help.adobe.com/en_US/as3/dev/WS52621785137562065a8e668112d98c8c4d
f-8000.html
Merge pull request #46 from thejustinwalsh/master

Asynchronous Image Loading
Bump exporter to 1.1-SNAPSHOT; use latest runtime
Catch texture creation errors in prepareForPublishing
Fix fillLabels for 1-frame movies
Movie.frames -> Movie.numFrames
Don't spend time updating single-frame movies
Library.getImageTexture
Merge branch 'master' of git://github.com/threerings/flump