Changed the plugin managers so they are not singletons anymore. This enables...
Changed the plugin managers so they are not singletons anymore. This enables multiple types of plugins to be loaded into the same application. Mainly, this was done to enable scripting and engine plugins to exist in the same executable as when you have imported the VisIt module into an application that is instrumented with libsim. git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@4541 18c085ea-50e0-402c-830e-de6fd14e8384