Merge pull request #56 from myell0w/master

Recognize Taps on the MessageView (was broken in iOS7)
* Restructured folders

* Removed tab bar from demo
* Renamed config file
* Changed all the initializer, sorry about that

* Updated demo project
* Renamed content to subtitle
* Improved documentation
* Added long text demo button

* Fixed typo in initializer
* Added methods to use a custom design configuration file

* Added example of how to use custom design
* Updated README
* Started with iOS 7 support

* Added background color option for different notification types