Use generic UpdatesCollection

instead of comments collection
Clear comment field after a comment is added
Use lightweight Router for resources

Instead of full blown Express instance.

http://expressjs.com/4x/api.html#router
Add puavo api proxy
update browserify
Add api.opinsys.fi authentication
Add user column to tickets tables
Rename model User -> UserSession
Change UserSession -> UserMixin. Use now it from server User model and later from client User model.
Save user information after authentication. Set creator when create new ticket.
Fix test for UserMixin
Fix indentation
Fix indentation
typo
Split code of Comment to own file
Save user id to comment object
User id to RelatedUser object
Fix datatype of user id
Add server Device model
Add new resource devices