[StarCluster] Plugins Question - Skipping SGE Install

[Austin Godber]

Hello Everyone,
     I was just looking at the StarCluster Plugins and was wondering how 
to do the following things:

  * Define an alternative to the DefaultClusterSetup
  * Optionally omit the _setup_sge() from the DefaultClusterSetup

The point being that most of the DefaultClusterSetup is quite generic.  
Its just that SGE may not be needed in some cases. It seems the plugin 
design includes only the ability to extend DefaultClusterSetup and never 
provide an alternative.

No hurry with a response, I am just reading the code and thinking about 
writing plugins.

Austin