Fix some hacked imports

Move the content of the auth module to better locations

Remove deferred import

Rename vo module to vos

Removes some obsolete methods

Closes #13

Fixes the removal of ssh keys of users.

Closes #7

We are switching from using Deployment to DeploymentState as deployment
objects (aka what's send to the clients). This is much nicer and
should've been done this way since the beginning.

The changes also entail API changes for the client.

Also changes the defaults of questionnaire and answers.

The problem is that we deploy Deployment, but questionnaire is bound to
a DeploymentState. To make this work (barely) I added the following
behaviour: Once a user PATCHs a DeploymentStates questionnaire the
DeploymentState is published by acting like it is a ServiceDeployment.
This works as long as the client just executes deployments (and does not
try to gain insight into the backend state by watching the incoming
Deployments)

I'm not happy with this hack.

With all those strange changes, the migrations were broken. I removed
all of them and started with new migrations.

For django-polymorphic i had to rename the Model 'bases' in the auto
generated migrations, as the seem to be case sensitive.

Makes Deployment and DeploymentState many to many.

Closes #7

Especially adds pending credential states

The user of a NewDeployment can be None

Previously if a service had no sites and no site was manually given
create_state_items failed. We now ignore such services.