Added emptyTable to DBLayout
Added emptyTable to DBLayout

Ignore-this: 45ec84e42f4654b1d82588ff500f7c9

Added emptyTable function which makes it easy to define 'fake' tables
against the information_schema.

darcs-hash:20100716224455-447ee-e0bf664f46e400c0e24ae4ba890f6ce0ecd37233.gz

m4dc4p/haskelldb