Refactoring of tickets controller to fetch the ticket in a before filter for relevant actions.
For both users and tickets, if the object is not found and the current user is an admin, they should see an alert that the object wasn't found, and be redirected to the current controller.

If the object isn't found and the current user is not an admin, then we will continue to give an error about no access, so as not to leak information about what IDs do and don't exist.
Deal with corner case where we don't have authenticated user. Will write a test after merging in show view for users.
Merge branch 'master' into feature/tickets_controllers_simplification

Conflicts:
	users/app/controllers/users_controller.rb
Should be able to create a user when not logged in.

This isn't ready to merge, as there is an issue with logging in as an admin in the test.
minor: smalles fix ever - is_admin? has a questionmark
Merge pull request #17 from leapcode/feature/tickets_controllers_simplification

Refactoring of tickets controller to fetch the ticket in a before filter...