Transpec unit

So... I was kinda bored today and decided that this would be a nice thing to have in place and ended up converting all of the unit tests syntax to rspec 3, it took me a while but here it is!

Of course that is not true, I just found out about https://github.com/yujinakayama/transpec and was very happy about the results on one of my projects and since I remember seeing some discussion around doing this over here I thought it would be nice to share :smiley:

/cc @phinze @yujinakayama