Consent_type table uses id, and consent table now refers to consent_type_id instead of name.
Additionally, added index of consent_time to consent table.
Added indices to consent and consent_type tables.
Moved initial content of consent_type table to new SQL file: content.sql
Modified database.py to insert new content.sql into database. In python autocommit is turned off by default, thus a manualy commit() was added.
Updated db_update.php to match changes in db/.