Improve "content/worker" documentation:
- added more links to the Worker object;
- added details on handling the 'detach' event.
Fix issues found during the review.
Merge pull request #992 from nickolay/worker-docs

Improve "content/worker" documentation
Merge pull request #993 from jsantell/fix-unique-array

Bug 870636, fix util/array unique, r+=@ZER0
Initial commit on Bookmarks/Folders/Tags for Places
Make Folder/Bookmarks inherit from the class parent class
Instantiate a shell Bookmark object when retrieving ids
Initial query work
Refactor places to be e10s ready, more functional
Fix event bussing, bookmarkitem creation
Progress
New work on async constructors, stateless
Initial tests
Remove this
Add save method, tests
Remove debugging
More save tests with moving bookmarks
Add remove, removeAllChildren
Add helper methods getBookmarksById, update for syncing with host
Fix byURL tests