Bug 1108772 - Part 5: eliminate ShareItem.icon.
Bug 1109772 - Part 6: expose Bytes.swift to the rest of the project.
Bug 1109772 - Part 7: add bookmark_folder_closed image.
Comment out live bookmarks test.
Flesh out Bookmarks.
WIP
Export both UITableViewDataSource, UITableViewDelegate.
WIP: more hacking to connect new bookmarks code.
Immutability and scope in Bookmarks.
Add success/failure callbacks to reloadData.
Eliminate redundant favicon set.
Hiding MemoryBookmarkFolder. WIP.