Fixed the pod spec
Fixed some errors
Added import all header; makes it easier in Swift

I figured out that in Swift (Xcode 6.1.1), you have to import all the
Objective-C headers for autocompletion to work properly
added import UIKit otherwise won't work with Swift
Added Swift demo project
Added File
Updated readme
Merge pull request #28 from yichizhang/master

Fixed the pod spec; Added a demo project written in Swift