v2.3.2

Change
update_all_spinoff_parent_project_id.py
cur.execute("SELECT id, url FROM all_spinoff WHERE DATE(update_time)<
(SELECT DATE_FORMAT( SYSDATE( ) ,  '%Y-%m-%d'))")
cur.execute('SELECT id, url FROM all_spinoff WHERE parent_project_id =
""')

add
is_checked, checked_date and inserted_time fields in user and
org_tutorials tables
If the record of user has been checked, set the value of is_checked to 1
If the record of org_tutorial has been checked, set the value of
is_checked to 1

insert_org_tutorial.py
if the tutorial is not in our database, add this tutorial and set the
value of is_checked to 0 at the same time.

insert_first_level_spinoff.py
if the value of is_checked in org_tutorials table is 0, then continue to
check the spinoff.

insert_user.py
if user in first_level_spinoff table is not in user table, then add this
user and set the value of is_checked to 0.

insert_all_spinoff.py
If the record of user has been checked, set the value of is_checked in
user table to 1