Fix issue #603, playback rate couldn't be changed on IE9

This was due to the test file (silence.mp3) having a very low sampling
rate, which IE9 apparently couldn't change playback rate for. The new
silence.mp3 file is 44.100Hz. Futhermore I've added listener removing
when the tests finishes
Use a module for deploy task instead of code in Cakefile
Merge branch 'lyt-2.0.x' of https://github.com/Notalib/LYT into stable
Merge pull request #610 from saebekassebil/stable

Fix issue #603, playback rate couldn't be changed on IE9