Adds try/catch support for Swift

Simple wrapper built around Objective-C to achieve the same result.

Usage

1. Create bridging header.

• When prompted with "Would you like to configure an Objective-C bridging header?" press Yes.
• Go to bridging header and add: #import "SwiftTryCatch.h"

2. Use

SwiftTryCatch.try({ () -> Void in
        //try something
     }, catch: { (error) -> Void in
        //handle error
     }, finally: { () -> Void in
        //close resources
})