Support for PostgreSQL 9.5+

[darkixion]

Currently getting this error when building against 9.5devel as CRC has been changed:

jsquery_op.c:19:26: fatal error: utils/pg_crc.h: No such file or directory
 #include "utils/pg_crc.h"
                          ^

Could this be updated to support 9.5?

[feodor]

Thank you, fixed

[NikolayS]

👍