Add basic cancan stuff (WARNING: VERY UNSTABLE)

You can literally do nothing, so don't merge this anywhere or try
anything with it.
Cancan works now! Yay!
A prettier way to do something that I came across randomly that has
nothing to do with cancan.
Make some sidebars.

@sammidysam @four04 what should we put in the left sidebar?
Space
Make some sidebars.
Space
Show period of class on sidebar
Merge branch 'sidebars' of github.com:kotct/docket into sidebars

My tree is happy now

Conflicts:
	app/views/layouts/application.html.erb
do magical float-y thing

See comments on b9ebdb2650489d14925a77f9ef212c7479eb2da5
Merge branch 'master' into sidebars
Merge branch 'cancan'

Conflicts:
	app/controllers/docket_controller.rb
Merge branch 'sidebars'