Major Update

Added support for horizontal UICollectionViews, now allows for setup from storyboard or via code, and added a storyboard example
Readme Update

Added information to the readme
Added Storyboard, Minor Changes

Added Storyboard files (forgot to include in last commit), updated TLSpringFlowLayout with more documentation and an iOS 7.0 check, removed unneeded demo app code.
Sample Project Updates

Updated sample project - added icons to tab bar and app, changed tint color to match Teehan+Lax colors, fixed collection view issue (noted in Pull Request comments).
Merge pull request #8 from Sam-Spencer/master

Horizontal Layout & Storyboard Support