Languages interface presents list of wiki languages.

Added core data field to allow article to remember its language name.

New core data fields to aid in pruning images and finding images with
same name but different size.

History and Saved Pages now show article language.

Change-Id: Ibd481c2e17a1cc1d322aab1d6753819515e1b836
Merge "Languages interface presents list of wiki languages."
Split screen table of contents.

Fix for TOC toggle zoom out jitter.

Scroll from *TOC* now remembered by web view across app restart.

Fix for TOC rotate crash bug.

Tapping “W” menu toggle or search box dismisses TOC.

TOC landscape divider gives more room to web view.

Fix for TOC blue selection flickers when scrolling from web view.

Now stripping html from TOC titles.

Tapping on web view in split screen hides the TOC if the user did
not scroll.

TOC button at bottom of screen only active if an article is
actually on screen.

Bottom bar buttons look nice in both iOS 6 an 7 now.

Fix for padding around TOC text.

iOS 6 TOC now looks nice.

Change-Id: I0c11bdad96fb718eddf089fbd09026dc7024a10d
Merge "Split screen table of contents."