added 'devicy_sync' and 'sync_status' api endpoints
fix bug in fitbit sync
Merge commit 'e595cdc94ecb33535baa60521eddfae4ac891a44' into pullrequests/more-api-endpoints

Conflicts:
	tac/apiserver.py
remove expire index on token.expire

BAC-5 #time 20min
Merge pull request #17 from blurrcat/BAC-5-token-expire

remove expire index on token.expire
log fitbit api request
Merge pull request #16 from wangsha/pullrequests/more-api-endpoints

added 'devicy_sync' and 'sync_status' to api endpoints