[Upstream] Simplify setting Namespace and ReleaseName

[viccuad]

In Helm:
action.Init creates a kubernetes client with a namespace set by a flag or environment variable.
ReleaseName is set by a flag, or by the name of the chart.

In Hypper:
We need to support the previous, plus read the chart annotations to discover if we need to use them. This means that we need to do a back-and-forth: create actions, then read flags and so, then load the chart, then set namespace and release name.

Could we simplify this?

See:
#49 (comment)
#89
#105
(and bugfixes per command, etc)