Cleanup and some small guards against NPE
Support for dispatching IO events in NetConnection and URLStream
Support for loading image files using Loader, including test case
Ignore node_modules in src/avm2/bin
Add comparison SWF for testing embedded images VS externally loaded PNG
Workaround for symbols being double-defined in dictionary
Merge pull request #270 from tschneidereit/master

Support for loading image files using AS3's flash.display.Loader