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Fixes #77

OCCI.stop() is mapped to OS.suspend() and
OCCI.suspend() is mapped to OS.pause()

Both OCCI operations are inverted by OCCI.start(), which consequently
has to distinguish the current machine state to trigger the correct
inverse OS operation, i.e. OS.resume() or OS.unpause.

object instead of a dict)

Conflicts:
	occi_os_api/nova_glue/vm.py

Occi user data

Pass the project_id as a kwarg to the API.

Use instance_types rather than flavors.

Pass the project_id as a kwarg to the API.

Use instance_types rather than flavors.

Fix term names to use IDs rather than names

Commit 567eeb85 fixed term names to use
the IDs of the images, since two different images can have the same name
but different id. This commit reintroduces this change, along with minor
style modifications.

Load flavor from instance_types rather than nova.compute to work with Grizzly.

Fixes SecurityGroupNotFoundForProject exception.