Added support for inline editing, statuses and element actions menu

I wanted to resolve #4 and I also went ahead and added a few other enhancements that I thought would be nice for the master repo.

Includes support for statuses, element actions, and cleaned up the edit page to use the standard two column layout.

Repo was a huge help in building my own element type: https://github.com/familiar-studio/craft-menus

Cheers!