Adjust the logic, so that if the apiserver restarts, or has no pod info
for some other reason, pods on missing machines are still 'terminated'
Documentation for users on volumes (current state).
Fix typos.
Merge pull request #1367 from erictune/volumes_user_documentation

Volumes user documentation
Merge pull request #1356 from brendandburns/healthz

Adjust the logic, so that if the apiserver restarts, or has no pod info
Fix the build.
Merge pull request #1371 from brendandburns/healthz

Fix the build.