refactoring db
change start date
remove zerorpc
Merge branch 'develop' of github.com:xiaocong/github-timeline into develop
move most data to mongo
add lang statistics for month
change users_info to users_stats
add trans.py to transfer db data
trans social from redis to mongo
remove social from redis
update crawler
update trans
add celery task
refine worker
add city and country rank
Merge branch 'feature/worker' into develop
add chinese name of city and country
add task to update users location
Merge branch 'release/20140404'