Added roles, but haven't yet hooked them up to CanCan
hooked roles up to cancan

Now only admins can create/edit forums, or mess with roles.

To add an admin user:

rails c
m = Member.find('skud')
r = Role.create(:name => 'admin')
r.members << m

We'll have to do this on the server to bootstrap the admin stuff.
Though actually, we should really write a rake task to generalise this.
Added a rake task to create an admin user.

You should only have to do this once, after deploying.  Subsequent
admins can add new ones via the web interface.

The syntax is:

rake growstuff:admin_user name=skud

or, on heroku:

heroku run rake growstuff:admin_user name=skud
show forum name in post meta
General prettification and making it look nice.

Also upgraded Bootstrap, just for the hell of it.
Added friendly IDs for forum and role