Gui about

* Add about box to display assembly information such as Product name, Company Name, Version, Developers.
* Add custom image to be displayed in the about box
* Update assembly Information
* Gives attribution

About Box:
![About Box](https://f.cloud.github.com/assets/5778739/1747377/42cd45da-6459-11e3-873d-f276420dd96c.png)