Remove jquery

main.scala.html: use cdn jquery
Add bootstrap to gitignore
models.js: started model implementation

models.js: more models
changed conf controller to use GCA Auth actions
AbstractFormat: handle null owners correctly (mainly for tests)
controller.Abstracts: complete the implementation
GCAAuth: return JSON in exHandlerJSON (and fix status codes)
[test] AbstractCtrlTest: Tests for the controller.Abstracts

Currently fails the test for "update". Fix for this comes separately
AbstractService::update: set owner and conference
models.js: implementation for all models

Features:
- conversion from and to plain object
- conversion from and to json
IntegrationSpec: removed due to selenium driver problems