Upgrade to 0.11.34

Latest version of gogs and its client offers the possibility to create a user

```
./gogs admin create-user --name=user4 --password=mypassword --email=user4@user.com --admin=true
```

So, I propose to upgrade the docker image and maybe that we merge what fabric8 did to create an admin user by default

https://github.com/fabric8io/docker-gogs/blob/master/cmds/start-gogs/start-gogs.go#L75
