Moved label handling code from Transformer to loader,
to make it generic to handle creating service types.
Added new attribute to ServiceConfig which gets populated
in loader.
Fixes#273
Now a user can provide volumes_from to share volumes
from other service so here the PVC created for that
service will be shared by service calling volumes_from
We had Command and Args together with Entrypoint in Kompose object.
This doesn't make much sense, as Entrypoint and Command are same thing.
I've removed Entrypoint from Kompose object in favor of Command to keep
same naming convensions as in Kubernetes.
Entrypoint from docker-compose.yml is now saved to Command and Command
is saved to Args (http://kubernetes.io/docs/user-guide/containers/).
docker-compose.yml | Kompose object
-------------------|---------------
Entrypoint | Command
Command | Args
Sorts objects in Transform function, this should
make sure that Services are first everywhere as
long as we keep order in the slice that Transform returns.
fixes#130
