Added Asynchronous Web Worker support (animWorker.js), modified GIFEncoder.js to support animWorker and added anim.js: example code to show how to use animWorker.
Merge pull request #4 from thejbw/master

Asynchronous web worker support.
expects integer, fixes canvas size bug #6

thanks to http://stackoverflow.com/a/16502793/592125
hmm
Merge branch 'patch-1' of github.com:forresto/meemoo-canvas2gif
Merge branch 'gh-pages' of github.com:forresto/meemoo-canvas2gif into gh-pages