Ankh v1.0.0-beta.6

Add --namespace argument to override the namespace passed to kubectl.

Support local chart directories with --chart that need not be present in any charts array in an ankh file. This makes local, iterative development easier when charts are not present in the same repo as ankh.yaml, or no ankh.yaml is used at all.

Change the behavior of --set to set straight up global values in .Values instead of appending global to enfoce .Values.global. This makes the behavior a bit more dangerous, but useful when using --chart.