Updates in Bearton util module: improved dict-helpers, Messenger now refuses to accept objects who do not have '.write' method as streams
Database.update() method now returns useful info about what was updated, Entry objects can update their contexts in a non-destructive way (keys are added but not overwritten, keys unused in newer version of scheme are removed)
Fixed broken tag closing in home element template
Removed unneeded debugging messages
UI updates: database update UI takes advantage of values returned by Database.update() method and provides better reporting