* upgrade to gcr.io/stacksmith-images/ubuntu:14.04-r06
* upgrade to mariadb-10.1.13-2
* create custom database with `MARIADB_DATABASE` env
* create custom user with `MARIADB_USER` env
* tests: Can create custom database with password for root
* can specify password for root with `MARIADB_ROOT_PASSWORD`
* upgrade to `mariadb-10.1.13-3`
* fixed test to create custom database with password for root
* organize dockerfile
* `chown` the volume only when `harpoon start` is the CMD
The `mysql` user is created when `harpoon initialize` is called. Until
that time we cannot use `mysql` user in `chown` commands.
* adds env vars to configure master/slave replication
* bump version to mariadb-10.1.13-4
* tests: added master/slave replication tests
* bump version to `mariadb-10.1.13-4`
* tests: fixed for changes in `mariadb-10.1.13-5`
Since `mariadb-10.1.13-5` the root user password can only be set using
the `MARIADB_ROOT_PASSWORD` environment variable.
* tests: added slave recovery test
* readme updated