Log Message:
Update ruby-sequel to 4.29.0.

=== 4.29.0 (2015-12-01)

* Add Model#json_serializer_opts method to json_serializer plugin, allowing for \ 
setting to_json defaults on per-instance basis (jeremyevans)

* Add uuid plugin for automatically setting UUID column when creating a model \ 
object (pdrakeweb, jeremyevans) (#1106)

* Allow the sqlanywhere adapter to work with sharding (jeremyevans)

* Support blobs as bound variables in the oracle adapter (jeremyevans) (#1104)

* Order by best results first when using the Database#full_text_search :rank \ 
option on PostgreSQL (chanks) (#1101)

* Run Database#table_exists? inside a savepoint if currently in a transaction \ 
and the database supports savepoints (jeremyevans) (#1100)

* Allow Database#transaction :retry_on option to work when using savepoints \ 
(jeremyevans)

* Allow for external adapters to implement Dataset#date_add_sql_append to \ 
integrate with the date_arithmetic extension (jeremyevans)

* Add Dataset#insert_empty_columns_values private method for easy overriding for \ 
databases that don't support INSERT with DEFAULT VALUES (jeremyevans)