Easier command line tools for OS X (and probably Linux)

[Zacqary]

To make it easier to use the local server and environment, I added the following shell commands to my usr/bin:

turbulenz:

#!/bin/sh
cd ~/Turbulenz/SDK/Current
. env/bin/activate
paster serve devserver/release.ini

turbulenv:

. ~/Turbulenz/SDK/Current/start_env

This required me to create a symlink called Current to the current SDK version. I have to manually point this to the new version every time there's an update.

Some issues I haven't been able to work out are that turbulenz always requires sudo on my machine, and turbulenv always requires . turbulenv for some reason. Still, though, I think if better versions of these could be integrated into the SDK installer, it'd make things much easier on *nix developers.

I'm just not sure how to go about that, hence why this is an issue instead of a pull request.