Improved the Sound Browser and added new outputs to the Sound Emitter

![soundbrowser](https://cloud.githubusercontent.com/assets/2457653/2690976/7bc6c92e-c36d-11e3-8b41-10577e8c409c.png)

I updated the Sound Browser to support property sounds. You can find any registered sound in the game now. The new changes are taking use of the new functions sound.GetTable() and sound.GetProperties().
You can get more information out of a specific sound. The Sound Emitter has two new outputs: "Properties [ARRAY]" and "Duration". The Sound Browser opens on right click now and some other minor changes were done.