Merge branch 'feature/users-can-authenticate' into develop

Conflicts:
	.gitignore
	.rspec
	Gemfile
	Gemfile.lock
	Rakefile
	app/controllers/application_controller.rb
	config.ru
	config/application.rb
	config/database.yml
	config/environment.rb
	config/environments/development.rb
	config/environments/production.rb
	config/environments/test.rb
	config/initializers/secret_token.rb
	config/initializers/session_store.rb
	config/routes.rb
	lib/templates/haml/scaffold/_form.html.haml
	spec/spec_helper.rb
Helper for creating tables.
Cleaning out some default rails files.
Added Subject model.
Renamed application.
Add subjects to db.
More app name changes.
Controller, views and css.
Merge branch 'feature/create-subjects' into develop
Removed old layout.
Added risk factors and gasses.
Merge branch 'feature/add-risk-factors' into develop
Removed dashboard.
Updated .rvmrc.
Updated database.yml
Added dependancy.js.coffee to handle form fields that have deps on others.
Increased ApplicationController spec coverage. Fixed redirects in SessionsController.
Usability tweaks for nested forms.
Brought data model to point where all data on form can be entered.
Added controller to allow adding/removing/editing of users.