Update stream.bat

This batch script asks the user for a stream name. Then is searches in the twitch.tv directory to validate if the stream is offline or it doesn't exists.

If it exists, it displays it, else it asks for a new stream or to exit.

The batch script was made for Windows 7 Ultimate SP1 (x64). In order to work you have to have python installed (I recommend ActivePython 2.7) and then install livestreamer (chrippa/livestreamer)