Merge pull request #58 from mixalich7b/master

Lazy initialization of view controllers and a few more new features.
Changed constants names
Updated README
fixed issue 60
Merge branch 'master' of https://github.com/andreamazz/SlideOutNavigation
Fixed issue 60, again
Fixed hit area around the left bar button
Updated README
Fixed issue 64
added GA
Updated readme
Fixed issue 68
Fixed issue 67
Adding Selection Font Color and Icon.
Merge pull request #71 from chrux/master

Adding Selection Font Color and Icon.
Fixed content controller sizing. Fixes #68
Merge branch 'master' of https://github.com/andreamazz/SlideOutNavigation
Merge branch 'amslideout/master'