Enabled warnings for suspicious implicit casts, and fixed all warnings produced by this. This involved switching specific use of float or double functions to use CGFloat and <tgmath.h>.
Cast to CGFloat before division to force floating point division. Also use arc4random instead of random, which I've seen Xcode warn about in other projects.
Merge branch 'tylerberry-master'
Fixed typos and updated instructions in readme. Bumbped Pod version.