v3.2.2

- [Feature] Multiple platforms on a single server \o/
- [Feature] Easily configure web proxy on the host
- [Bugfix] Fix `images pull all` command which failed on "all" image
- [Improvement] Add configurable mongodb, SMTP and rabbitmq
authentication
- [Improvement] Harmonize mysql username/password configuration
parameters
- [Feature] Configurable and pluggable data storage backends (#114)