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
Automatic Movie management via MoviePlayer

MoviePlayer tracks all Movies that are added to the display list, and
updates them.
"Export Modified" button

(only exports those projects that have been modified)
playTo(): if we're already on the stop frame, don't play
Remove maven2builder from project
Flash Builder project cleanup
Added optimize option to tweak the packing strategy.

Can either optimize for speed (fewer atlases) or memory (smaller
atlases). Memory is the default. Closes #48.
BitmapData Quality Settings

Adds support for changing the StageQuality setting used to render the
BitmapData when generting textures.

The default setting is StageQuality.BEST, however BEST is a relative
term since newer versions of the Flash Player have given us HIGH_8x8,
HIGH_8X8_LINEAR, HIGH_16x16, and HIGH_16X16_LINEAR.

Regarding Issue #39