Update jquery.easy-pie-chart.coffee

jQueryUI like easing method
- It is easier to change it to Cube/Quart/Quint
- In the future, easing could be set in options, to use jQueryUI effect easing methods
Merge branch 'patch-1' of git://github.com/alex-pex/easy-pie-chart into alex-pex-patch-1
compiled version for pull request #1