tidy up viewdata page
make viewdata prettier; add an update listener for it to dao
fix overlayed legend
added title to weight entry dialog
fixed nasty npe after restart; started adding prefs system
fixed renderbug in prefs
fixed failing unit tests after removing duplicate layout loader in mainactivity
convert bunch of text fields to table of statistics; use consistent case for string resources; support for latest weight message
initial bmi support but seems broken because of prefs system
fixed preferences type conversion
support for trend weights