Allows for status bar customization in iOS 7

Adds method implementations required to allow the
contentViewController to define a preferred status bar style.
Merge pull request #19 from thusfresh/UIStatusBarStyle

Allows for status bar customization in iOS 7
Fix formatting #19
Update copyright
Version bump (2.1.2)
Version bump (2.1.2)
Merge pull request #1 from romaonthego/master

merge