Updated Sample to include support for iOS4.3+

The iOS target was 6.0. I was wanting to test it out against an iOS target of 5.0.

Using CocoaPods:
[!] IODProfanityFilter (1.0.0) is not compatible with iOS 4.3.
[!] IODProfanityFilter (1.0.0) is not compatible with iOS 5.0.

I think the only post 4.3 version requirements were autolayout, storyboards and the weak outlets in the sample project.