Extend all to more resources
Extend all to more resources

Added more things from the list here:
https://github.com/kubernetes/kubernetes/blob/master/pkg/kubectl/cmd/cmd.go#L159

Update the devel/kubectl-conventions.md with the rules mentioned by
a few folks on which resources could be added to the special 'all' alias

kubernetes/community,bgrant0607/community,pwittrock/community,pwittrock/community,kubernetes/community,bgrant0607/community,kubernetes/community