Version 2.0 - ARC Compatible, Code Cleanup, Demo App Improvements

Converted project to ARC. If your project does not use ARC, add the ARC
flag to the Bar Chart files in your project's Compile Sources section:
`-fobjc-arc`.

Improved the demo app. The demo app now runs on iPhone 5 and iOS 5 or
higher. It also begins the transition to a more interface based Bar
Chart integration system.

 Code cleanup and reorganization to make it easier on the eyes.

Project now compiles with ARMV7 and ARMV7S instead of ARMV6