added new models
Merge branch 'new_models' into develop

Conflicts:
	api/models/NSServerCampus.js
	api/models/NSServerCampusTrans.js
	api/models/NSServerUser.js
	api/models/NSServerUserCampus.js
Changed measurement_UUID field to measurement_id
Merge pull request #8 from petekrull/develop

+ Added Steps, TransactionLog and UserSteps