Added sectionImage associations to core data store + TOC menu!

More concurrency updates.

Fixes for saved page deletions.

Added swipe to delete to history items.

Swipe to delete fixes.

Thumbnail grabbed from section image if thumbnail not found.

Added title to top of page.

Initial css styling.

Moved info box under lead section.

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Table of contents with section images!

Presently TOC is invoked with a 2 finger tap - will probably change.

Fixed section div numbering bug.

Fixed "Loading remaining sections" message bug.

Can now track with precision html element locations both in web view space
and screen space. Even accounts for pinch zoom level!

Style fixes for overflow tables narrower than their parent elements.

Hide audio tags for now.

Change-Id: I480e36d53a36b1f8506e22e1f887f78cb7fd0a19
Merge "Added sectionImage associations to core data store + TOC menu!"