Don't sudo install gems, to avoid failures like https://travis-ci.org/mysociety/popit/jobs/4003721/#L1054
prefix path to node with path to app
Make version numbers strings and add "0.10"
Disable creation of new instances (mostly by commenting out the related code).

part of #242
Explain that new site creation has been disabled. Use google form to collect email addresses for re-enabling announcement.

Closes #242
rebuild npm-shrinkwrap.json
deploy to production - version bump to 0.0.13
Merge branch 'master' into production
Update static assets