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