When kompose convert -o artifacts is run, then if artifacts is a directory,
kompose stores all the resulting files inside it, and if it's not a directory,
it stores the artifacts in a single file.
Fixes#209
if a user specifies a docker-compose service
with restart value as "no" or "on-failure"
then normal pod will be created as against
to a controller and a pod.
Volume constraint is missing in mariadb service
in etherpad example, so added that so that it mariadb container
does not fail in environments where creating container in
/var/lib/mysql is not allowed for non-root process.
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
Now a user can select a provider using global flag
--provider=openshift to select openshift provider
or --provider-kubernetes to select kubernetes provider
if nothing is provided kubernetes is the default provider.
Fixes#179
