Add a script to run 'go vet'
Delete unused function.
Merge pull request #1705 from erictune/dead

Delete unused function.
Use pointer for struct holding lock.
Merge pull request #1633 from thockin/vet

Add a script to run 'go vet'
Merge pull request #1711 from erictune/vets

Use pointer for struct holding lock.
WIP: cloud-minion