hstore being returned with no escaping inside causing parser to fail

[dhenson02]

This is essentially the same issue as #221 but with hstore. The string returned as the value is double-quoted and contains all the original hstore double-quotes with no escaping.

Example result from inside .columns (truncated cuz its huge):

{"name":"patient_info","value":""ssn"=>"", "c1AddressLine2"=>"", "employerAddress"=>"", "enableVerterinary"=>"", "providerfacilities"=>"""}

Causes parser to throw