Wikibase/Schema/wb changes dispatch

Versions
Current as of Wikibase 0.4 (19 Feb 2013) +--+-+--+-++---+ +--+-+--+-++---+ +--+-+--+-++---+
 * Field       | Type                | Null | Key | Default        | Extra |
 * chd_site    | varbinary(32)       | NO   | PRI | NULL           |       |
 * chd_db      | varbinary(32)       | NO   |     | NULL           |       |
 * chd_seen    | int(11)             | NO   | MUL | 0              |       |
 * chd_touched | varbinary(14)       | NO   | MUL | 00000000000000 |       |
 * chd_lock    | varbinary(64)       | YES  |     | NULL           |       |
 * chd_disabled | tinyint(3) unsigned | NO  |     | 0              |       |