Refactor: Move insertFirstStory into stories
Refactor: Move isBacklogBroken to stories

Also move getPreviousStory into stories
Refactor: Rename 'usefulStories' to 'stories'
Refactor: Rename 'serverStories' to 'stories'
Fix: Refactor: Move 'getPreviousStory' into 'stories'
Backlog: ng-cloak the fix-error pane

It can flash from time to time.
Refactor: Backlog: Remove unused 'storiesToSave'
Fix: Refactor: Moving 'serverStories' to 'stories'