Released 0.5.1

[Robbie Harwood]

== Highlights ==

* Fix bug with export creds that can cause NFS failures
* Fix bug with uid/pid/gid changes that can break autofs

== Detailed Changelog ==

Andrew Elble (1):
* Fix typo in gp_get_export_creds_type()

Robbie Harwood (3):
* Fix return check on gp_conv_gssx_to_name
* Use new socket if uid, pid, or gid changes
* Release version 0.5.1