tue/2IOC0-DBL/Datafiller - Fill database with tweets, etc.

Age	Commit message (Expand)	Author	Files	Lines
2014-05-10	Convert String to DateTime (for created_at)	Peter Wu	1	-1/+3
2014-05-10	user.time_zone can be null too	Peter Wu	1	-0/+1
2014-05-09	Entities can be missing, user.place is not a string	Peter Wu	1	-0/+1
2014-05-09	Add missing validation annotations, ...	Peter Wu	1	-0/+21
2014-05-08	Add json containers for Tweet and User objects	Peter Wu	1	-0/+18