Merge pull request #18 from cmarinos/master

- Model for a User in order to login/register
fix directory structure
Merge pull request #19 from louridas/master

fix directory structure
fix tests
Merge pull request #20 from louridas/master

fix tests
- Update User model
- Create login, logout routes
- Update dependencies
Merge remote-tracking branch 'upstream/master'

Conflicts:
	backend/app.js