crash due to use_citusdb_select_logic on postgres is fixed (#10)
Update error message

When the "use_citusdb_select_logic" configuration parameter is set
to "true" on postgres, an error report is produced. This commit is
done for updating the error report.
White space change

According to CitusDB coding conventions, it is required to have a space
after "if".
Merge pull request #29 from citusdata/feature/citus_integration#10

Crash due to use_citusdb_select_logic on postgres is fixed

cr: @jasonmp85
Shards backed by foreign tables marked correctly in the metadata

Before this fix, when a foreign table is distributed by
"master_create_worker_shards", "storage" field in the
"pgs_distribution_metadata.shard" was set to 't'. After the fix,
it is set to 'f'. Note that 'f' denotes foreign table, 't' denotes
table.
Merge branch 'develop' into feature-issue#12