Update Podspec

Add scatter files into chart

Update readme for realtime update, kevinzhow#107

Merge branch 'feature/dynamic_value_update' into develop

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

Fix readme

Merge pull request kevinzhow#51 from rochefort/modern-syntax

Convert to modern Objective-C syntax

Fix repo

Add podfile

Move files