Extension:OpenBadges/openbadges class table

Schema
mysql> describe openbadges_class; +-++--+-+-++ +-++--+-+-++ +-++--+-+-++ 6 rows in set (0.00 sec)
 * Field          | Type           | Null | Key | Default | Extra          |
 * obl_badge_id   | int(11)        | NO   | PRI | NULL    | auto_increment |
 * obl_name       | varbinary(64)  | NO   | UNI | NULL    |                |
 * obl_description | blob          | NO   |     | NULL    |                |
 * obl_badge_image | varbinary(255) | NO  |     | NULL    |                |
 * obl_criteria   | varbinary(255) | NO   |     | NULL    |                |
 * obl_tags       | blob           | YES  |     | NULL    |                |