Disable persistence for MongoDB as a default

Changelog for 0.8.5:

Commits
248bc6e Disable persistence for mongodb, and add flag by @alexellis
812703b Add docker-registry to readme by @alexellis
33d56fd Revert crypto in vendor by @alexellis
5a57af1 Revert crypto to working version by @alexellis
71ba46f Update vendor by @alexellis
a0d49c8 Add crypto by @alexellis
f36d42c Add planned flags for Ingress by @alexellis
30aafd4 Add docker-registry app by @alexellis

Generated by Derek