Update docs with network troubleshooting information for clusters.

Hopefully help's others resolve the underlying issue in #138
Merge pull request #145 from porterjamesj/patch-1

Update docs with network troubleshooting information for clusters.
Add James to contributors. Thanks for degugging documentation: #145
Provide easier mechanism to upgrade with third party tools included by using saved installation details. Avoid confusing errors with old bare  upgrade option
Release v0.7.4