Add Python dependencies
Linux setup instructions
Fix setup.sh so it works if you're not Brandon
Remove unused commands
Finish the sentence
Begin the Windows setup instructions
Tweak the wording
Don't install wxPython in the virtualenv

For some reason, pip starts to grab/install wxPython 2.9 when wxPython
2.8 is already installed. If I use "pip install wxpython==2.8" instead,
I just get an error that a matching version can't be found. Since we
create the virtualenv using --system-site-packages, wxPython will get
loaded properly if it's available in the main python install whether or
not we install it within the virtualenv.
Instructions for the easy Windows method
Instructions for the hard Windows method