Kevin

Update README.md

... ... @@ -10,7 +10,7 @@ A simple and beautiful chart lib with **animation** used in [Piner](https://itun
## Requirements
PNChart works on iOS 6.0 and later version and is compatible with ARC projects. It depends on the following Apple frameworks, which should already be included with most Xcode templates:
PNChart works on iOS 6.0 (Begin with 0.8.2 supports iOS 8 and Later only, if you are working with iOS 6 and iOS 7, use 0.8.1 instead.) and later version and is compatible with ARC projects. It depends on the following Apple frameworks, which should already be included with most Xcode templates:
* Foundation.framework
* UIKit.framework
... ...