update trip_spec to test user association
add user_spec for testing User model
add user migrations
add user_id to trips
rake db:migrate
update migrations
update schema
add bcrypt
add user factory
udpate user migrations
update user specs
add User model
update trip model with user association
add white_list user_id
update trip factory to have user_id: Hardcoded, waiting on session
Merge pull request #28 from Edchen001/user_model_xiran

User model xiran