changed gem file
Added pg gem to gemfile.
migrated user.rb
added database cleaner
add test cases to email and password
add rookie, guide and review models
Merging Mu-Wah's Test
added first and last name into user table
Merge pull request #3 from MuWahLee/add_rspec_user

added first and last name into user table
Synced with Charlie's Front End and JS
Updated to team latest with JS file