[WIP] Start refactoring the problems_controller.

1) Limit some before_filter using the expose system
2) Extract some view test in view spec instead of controller spec
[WIP] refactor the problems_controller

Extract the filter `find_problem` in decent_exposure to get this problem
Added jira as new issue tracker
Merge branch 'master' into refactor/problem_controller
Little refactoring of action in ProblemController
Move the spec fabricator in model spec. It's more related
Refactor ProblemController

Extract some instance variable in DecentExposure
extract same usage of params in ProblemController and AppController
Refactoring of AppsController

 * Stop using inherited_resources and only decent_exposure
 * Use decent_exposure when it's possible
 * Extract some translation
Merge pull request #521 from shingara/refactor/problem_controller

Refactor/problem controller
Move some test view in spec/views instead of render_views in
spec/controllers
Move the spec about apps/show.atom.builder in his own spec
Avoid require issue_tracker model directly in Gemfile when it's not
needed
Update javascript-stacktrace to tag 0.5.3.
Adds current user information to notifier.js
Merge pull request #523 from aliscott/javascript-stacktrace-0.5.3

Update javascript-stacktrace to tag 0.5.3.
Merge pull request #524 from roryf/master

Adds current user information to notifier.js
Merge branch 'master' of github.com:errbit/errbit
add javascript notifier changelog [ci-skip]
Merge pull request #516 from xenji-feature/jira-issue-tracker

Conflicts:
	Gemfile.lock
add jira issue tracker on changelog [ci-skip]