Fix iOS6 Deprecations and Floating Point Warnings

[seanwhitsell]

We love clean code. Please Pull these changes in.

[jklp]

Hi, thanks for the pull request though unfortunately it looks like DCIntrospect is no longer maintained. Good news though, myself and @Logicreative have decided to revive DCIntrospect, and created a fork at https://github.com/logicreative/DCIntrospect-ARC to hopefully merge all pull requests and forks back into a single repo.

If you don't mind sending your pull request to the DCIntrospect-ARC repo, we'll try and merge it as quickly as possible. We're also going to be more active with the CocoaPods package manager, so we'll update the latest CocoaPod's podspect once all changes have been merged.

Thanks
Jerrold