Rename Saved Pages to Bookmarks

Part of an effort to de-emphasize the locally saving pages
aspect of this feature.

Change-Id: Iefa4ae31f6bdb4160b6d72b21e1da91727e08883
KILL SAVED PAGES, MAKE THEM JUST BOOKMARKS

DIE DIE DIE SAVED PAGES! DIE

- Creates a new table called bookmarks, bumps db version number
- Message keys not renamed yet, needs co-ordination with twn
- Loses previous saved pages from the alpha but that's ok

Change-Id: Id2c824cb03969d0a3ef79f55e1e9b4b685b448c0
Merge changes Id2c824cb,Iefa4ae31

* changes:
  KILL SAVED PAGES, MAKE THEM JUST BOOKMARKS
  Rename Saved Pages to Bookmarks