fix expired tile generation, wasn't getting out of copy mode before trying to use the prepared statement get_wkt to delete ways found in a relation
Merge pull request #225 from kevinkreiser/kk_fixexpire

Fix Exception on Expiry Output Option Used
Merge remote-tracking branch 'origin/master' into kk_docs
make multi backend use the provided table name verbatim. prefix doesnt make sense when you can name the thing directly