Base wagtail repo

This should be a working base install of wagtail with a main templates directory to hold a base.html for templating. The bulk of the site is in main/. I added a few pages to see what it'd look like. u/pw for admin is admin/admin. 

Make sure to install requirements.txt and then runserver should work. I pointed it to a forked repo of wagtail instead of the main repo in case we need to make changes to core.

I think this seems like a good starting point?