Fixes a bad link in pods.md document

The pods.md document was referring to the networking.md document, and
was including the docs/ prefix, which led to a 404 due to the link being
https://$host/docs/docs/networking.md. Removing the docs/ prefix gets
the link working again.
Handle empty array in update.sh

Fixes #1776
Merge pull request #1781 from jaypipes/doc-fixes

Fixes a bad link in pods.md document
Break out dynamic salt files to enable clean kube-push.

This lets us blow away salt files and replace them with a new version while keeping a tree of "overlay" files that are cluster specific and generated at cluster up time.

Fixes #1783
Merge pull request #1787 from jbeda/e2e-fix

Fix kube-push