FIXED: Comment_history Search.

it works now.
FIXED: flight search result sort.

it's worked now~
MERGED: merged origin/liang to master
ADDED: integration with group 1 for user authentication
FIXED: comment, comment_submit

changed: get_flight_transaction(..) in ymmbooking.py
Merge remote-tracking branch 'origin/liang'
headbar changed
head bar changed
ADDED: 'group' info for /login
ADDED: reservation of template for /login
FIXED: now getting redirect_url from POST instead of GET
Merge branch 'master' of github.com:starrify/ymmbooking
a bottom padding
Merge remote-tracking branch 'origin/liang' into czh
Merge branch 'master' into czh