Android wear app

This pull request adds an android wear app that makes it possible to view the currently running lectures, the upcoming favorite ones and also the next lecture for each room.

Here are some example screenshots:

![upcoming_example](https://cloud.githubusercontent.com/assets/1887163/5554736/21a0d9c6-8c71-11e4-99e8-80a12e062989.png)
![favorite_example](https://cloud.githubusercontent.com/assets/1887163/5554737/21ad5778-8c71-11e4-8937-5caf3342c23e.png)
![current_screen](https://cloud.githubusercontent.com/assets/1887163/5554738/21b1d212-8c71-11e4-8bff-8917a04af403.png)
![favorite_screen](https://cloud.githubusercontent.com/assets/1887163/5554739/22264f7a-8c71-11e4-98a1-5a84c9ee06bb.png)