multi-window capability.

[Calvin Morrison]

Hey,

I have just pushed a large commit [0] to the repository that enables
users to spawn multiple windows. I find this preferable to running
multiple svte commands because there is a reduced amount of overhead.
New windows open faster than spawning an new process.

To try it out just rebuild svte and press control+shift+n.

Let me know if it works, or any other problems. If you want to review
the code, please do :)

Thanks!
Calvin

[0] https://code.google.com/p/svte/source/detail?r=3a000dccffc33449c22b248e4d7fd9bc0f0130a6