Update Muti Select Function for Pie Chart

Merge pull request #261 from ecaselles/ec-disable-animations

Disable animations when drawing charts (if desired).

Merge branch 'master' of https://github.com/kevinzhow/PNChart

Update pod

values of type 'NSInteger' should not be used as format arguments;

ShowLabel in default

Update readme

Fix warnnings

Merge pull request #175 from lunzii/master

Add options for chart legend font style.

* Improved Pie Chart and Legend Chart