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- Remove foreign key dependency between Service/Resource model. Replace
  it with a service CharField to keep track of the service identifier
  that the resource was registered from.
- Remove all references to resource service name in resource lookups

When changing the default base quota (uplimit) for a preexisting resource,
do a bulk update of the related holdings.
When importing a new resource, create the new related holdings.

Prompt the admin for the uplimit in the management command, if a config
file is not given.

Register a service's resources giving option --json <file>.
The json file is expected to represent a dictionary with keys
"service" and "resources".

Currently the default base quota (uplimit) for each resource is read
from a configuration json file, given with --conf <file>. This file
represents a dictionary with numeric values for each resource name.

Upon importing the resources, the quotaholder has to be updated due to
the modified resource limits.

Also remove unused ResourceMetadata model.

UI-related presentation data go to presentation.py.
Remove load_service_resources call and related astakos-init
management command.

* Document 3 new AstakosClient Exceptions
* Change package name from snf-astakos-client to astakosclient

Refs #3440

Refs #3440

Incorporate accept/reject functions in resolve_pending_commissions,
in order to enforce a total ordering on locking holdings.
Add a wrapper (resolve_pending_commission) that operates on a single
serial.

Most astakos-quotas calls use services' tokens

Refs #3440

Refs #3440

Refs #3440

All Exceptions that AstakosClient is raising should
be under AstakosClientException class

Refs #3440

Refs #3440

No more needed, since quotaholder is integrated in astakos.

The quotaholder has been integrated in snf-astakos-app package.

move astakos.im.synnefo_settings to astakos.synnefo_settings and make
the appropriate changes in setup.py

Conflicts:
	snf-astakos-app/astakos/im/api/service.py
	snf-quotaholder-app/quotaholder_django/quotaholder_app/callpoint.py

Conflicts:
	docs/older/Changelog.pithos-app
	snf-astakos-app/astakos/im/api/__init__.py
	snf-pithos-app/pithos/api/util.py

Conflicts:
	snf-astakos-app/astakos/im/messages.py

use the new synnefo.user method `get_username` to populate
personal/shared images.

An unevaluated query ends up being used as an argument of intended list
type to another query, which fails in the case of an EmptyQuerySet, which
is not iterable.