Fixes #14. Make the 'Submit a Proposal' link stand out more.
I re-enabled the routes to the review controller.
I also changed the Procfile to always start rails on port 3000.

I did these things for a reason. :) The github oauth setup that Paul put together is configured to allow auths
on 'localhost:3000'. The review controller requires auth, and foreman defaults to port 5000. Combine that with
just how unredeemably lazy I am, and it all makes sense. I'm not typing `foreman s -p 3000` all the damn time.
Some better styles for the review list.
Adds a safe flag to proposals.

Defaults false; admin users will need to review a proposal to ensure that it's sufficiently neutral (i.e., no gendered pronouns in talk fields)
before marking it as safe to review.
Rescope event editing into a namespace of control.

Doing this because admins are about to do a lot of things and I don't wanna clutter one controller.
Finishes the transition to namespaced controllers for admins and lays groundwork for proposal safety reviewing.
Abiding by https://github.com/bbatsov/ruby-style-guide
Simplifying can permission stuff.
Merge pull request #53 from jnf/cg/refactor_can

Refactor can permissions stuff
Rollback procfile change; use .env to default port to 3000.
Merge pull request #49 from jnf/jnf/review_revisited

Jnf/review revisited