Initial commit on implement_users branch
Added routes/controller methods/views for users table
Created basic form for new user (signup)
Added migration to change passsword_digest column in users table to password_digest.  This allowed the new user creation method to work.
Added 'sign-up' link to new_user_path on the landing page (home.html.erb)
Merge branch 'master' into implement_users

Conflicts:
	config/routes.rb
Added show/edit/update/destroy routes and views.  Added partial form for dual use by new/edit. Put message on root page displaying the current session user id, for testing only.
Merge branch 'master' into implement_users

Conflicts:
	config/routes.rb