Rely on error handling middle ware to handle server errors during request processing, instead of calling sendServerErr
- add contacts model and associations
Merge branch 'master' of github.com:dounan/contacts

Conflicts:
	models/index.js
update migrations to use raw sql
update tag model to validate non null user_id and add timestamps
Merge branch 'master' of github.com:dounan/contacts
add User and Tag model associations
add tests for contact model
make user.email index unique
- Clean up unused routes
- extract specific user attributes from request parameters
add contacts controller and routes
- Add ensureAuthenticated middleware to necessary routes
Update tags_controller to not use setUser and to respond with the newly created tag
Merge branch 'master' of github.com:dounan/contacts
Configure app to use jade templating engine
require contacts_controller
Render index.html with jade