added ignore plugins flag in DependencyFinder
significantly improved exporter sets capturing (performance wise and
otherwise)

Also, the protected functions and classes are now being included in the
public functions and classes sets in DependencyVisitor, so that they can
also be    evaluated when considering indirect dependencies in first the
plugin level pruning and later at the global level in DependencyFinder.
added the capability (a quick fix for now) to add all non private
members, classes and methods, as public members when building plugin
extracts.
javadoc