Merge pull request #34 from piaw/master

check person profile before lookup
Allow user to add food not in database, but no nutrition information is shown for this kind of food.
add time details for each record.
revert recommendedFood to the correct version
add time column and show all the log entries.
make delete work with date/time/food
Merge pull request #14 from xiaoqin2012/master

merge from xiaoqin