Fixed promiseSegueWithIdentifier:sender: issue that wouldn't allow to call an overriden prepareForSegue:sender: on a derived class.
Update UIViewController+PromiseKit.m

Oops, accidentally pressed a space before commiting.
Update UIViewController+PromiseKit.m

<objc/objc-runtime.h> does not seem to be available when compiling to an iOS device.
Update UIViewController+PromiseKit.m

Reverting the [space]* change to avoid unnecessary changes.
Merge pull request #101 from josejulio/master

Fixed promiseSegueWithIdentifier:sender: issue