Several improvements to the installation script.
Several improvements to the installation script.

1) verify that the requested API version is supported by the underlying Kubernetes.
2) verify that the Cluster-Insight output contains all expected resources.
3) document functions.
4) cleanup parameter matching code.

EranGabber/cluster-insight,google/cluster-insight,EranGabber/cluster-insight,rimey/cluster-insight,rimey/cluster-insight,EranGabber/cluster-insight,rimey/cluster-insight,google/cluster-insight