User may suggest lightning talk

* Create Talks model and migrations
* Add suggested_talks to User model
* Extract login to spec_helper
Merge branch 'master' into HEAD
Added some comments to thunder app and fixed a comment no longer in effect
resoloved merge confilcts
untested
Conflicts:
	thunder_app.rb
Fix indentation for _suggested_talks.erb
Merge pull request #6 from gopher-snakes-2013/user-may-suggest-lightning-talk

User may suggest lightning talk