If the number of keys picked from proximity is too large, prune out
the subtree. Otherwise you get vastly unrelated suggestions.
Fix a bug introduced with the missing_chars checkin.
Changed the tree structure to have variable length nodes to save an average of 21% on the dictionary size.
Created a shortened English dictionary for Dream - 50K words.
Added a shortened Spanish dictionary for Dream - 32K words.
Original author: yamasani
Merged from: //branches/cupcake/...
Automated import of CL 143659
