Pass connection errors to callback
Add ping()
Bump version
Merge branch 'release/1.1.2' into production
Merge tag 'v1.1.2'

1.1.2
Merge pull request #26 from strongloop/feature/fix-crash-on-connect-failure

Pass connection errors to callback
1.1.3
Merge branch 'release/1.1.3' into production
Merge tag 'v1.1.3'

1.1.3
Add reconnection support.

Renamed pg to make a bigger distinction between postgresql
(the connector), pg (the connection library), and the individual
connection.

Signed-off-by: Samuel Reed <samuel.trace.reed@gmail.com>