/**
  * Make sure necessary tables are filled out.
  */
 function onCheckSchema()
 {
     $schema = Schema::get();
     $schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
     $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
     $schema->ensureTable('feedsub', FeedSub::schemaDef());
     $schema->ensureTable('hubsub', HubSub::schemaDef());
     $schema->ensureTable('magicsig', Magicsig::schemaDef());
     return true;
 }