Added the ability to open Youtube links.

When you open a Youtube link from another app (like a messaging application or a browser) it will ask you to open with "netmbuddy". If you select it, then it will search all the videos that match with the URL.
![2](https://cloud.githubusercontent.com/assets/6617055/3761433/34a0de3c-188a-11e4-90d7-0594fa8349d8.png)
![3](https://cloud.githubusercontent.com/assets/6617055/3761434/34aab97a-188a-11e4-9135-2410d63069d5.png)
![1](https://cloud.githubusercontent.com/assets/6617055/3761432/349a2f88-188a-11e4-9df9-1ea3f7d08eef.png)