Added sectionImage associations to core data store.

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.

Change-Id: Ib634c5cd57431bd354249c902650bb79c1d647d4