Document usage of submodules.

refs #40
Update node to 0.10.26 and fix permissions

- Update default version to 0.10.26 in manifests where hard coded
- Change upstart config to template with node_version passed in
- Update recursively the owner on the nvm folder to ensure permissions
Merge pull request #42 from jgable/cleanup

Update node to 0.10.26 and fix permissions