Don't include tag.id in warning about dropped tags: since we now handle nested symbols, the id can never be anything but undefined at this point.
Warn about dropped tags in one more place
Use custom closure compiler for extension builds
Copy avmshell to additional location
Improvement to the FF extension's context menu

Specifically:
 - Bug 1068342 - Add a "Reload in Adobe Flash Player" context menu item to fallback back from Shumway to Flash (we had this under a different name)
 - Bug 1064435 - Add "About Shumway [version]" context menu item, like Flash plugin's "About Adobe Flash Player [version]" (without the [version] part for now, because that's a bit annoying to do/hard to make work without introducing startup time regressions)
 - Bug 1064005 - Shumway "Report Problems" context menu item does nothing: ReferenceError: avm2 is not defined viewer.js:171
 - No Bug - change the "Report Problems" entry to open a bugzilla.mozilla.org bug entry form prefilled with some useful information and set to the correct component
Fixes canvas resizing in the easel
Replacing sandbox eval
Avoiding intermittent failures with acid-image-2
Gives more time for fonts to be loaded
Adds a perf testing framework.
Bug 1067130 - Complete overhaul of mouse target finding, hit testing, and getObjectsUnderPoint. r=?
Bug 1067130 -Part 2: Add reftest for getObjectsUnderPoint. r=tobytailor
Reduces the number of rectangle allocations and adds a fast path for filling the entire data buffer, 25% faster.
Also handle the case where the intersecting rectangle is equel to the bitmapData rectangle.
Uses Rectangle pools to BitmapData::copyPixles, ~ 68% faster.
Stick to integer arithmetic whenever possible.
Add perf test.
Breaks on avm1 warnings
Properly handles START_SOUND tags
Reverting #1728