Bumping version to indicate important bug fixes
Avoid explosion if node is disabled

Stingray explodes if you attempt to transition a node from draining to
disabled.  This prevents that explosion and leaves the node in a
disabled state.
Correctly preventing node from being disabled/drained

Previously, if the node was draining, it would still converge and then
undrain itself.  The correct behavior is that if a node is already
draining or disabled at the beginning of the run, it should not
transition.

Also, DRYing up script.