add content-type for audio file uploaded:
 - mp3 - audio/mpeg
  - wave - audio/wave
Fixed mxmlc compiler path.
Cleaned up grunt file.
Fixed sample file.
fix(microphone) cancel the recording when there's no data emitted on microphone.
v0.3.0
fix(container) revise flash container layout and block checker
v0.3.1
fix(container) Fix encoding rate drop on flash version 11.3
v0.3.2
fix(recorder) Grant for cross-domain access.
http://help.adobe.com/en_US/as3/dev/WS5b3ccc516d4fbf351e63e3d118a9b90204-7c85.html#WS5b3ccc516d4fbf351e63e3d118a9b90204-7e08
v0.3.3