Adding the ability to push side panels rather than overlap them

Making the center panel change behavior a little better for the multi…

…active style

Making some small fixes to the demo app for iPhone 5

Merge pull request gotosleep#30 from stuffmc/patch-1

Fixing tiny Typos (but resulting in not compiling)

Fix warning: implementing deprecated method when deployment target is…

… set to 6.0

Cleaning up the demo a bit

Updating demo application to show center panel hiding/showing

Merge pull request gotosleep#13 from spilliams/master

Usage should include more instruction