API 0.4 Updates - work on traces pages + pagination, edit tab, some API testing

* traces - added some routes, replicated data access / pagination, but presentation and pending file control not complete
* edit - setup so that applet can be loaded + token authorisation enabled
* API - tests out ok against applet, but had to change segment-node associations
* misc - gems version required upgraded to 1.2.3 (latest stable rails version), changed some find_first to find(:first... calls