[cdt-dev] DOM Visitor interface

[Andrew Niefer <aniefer@xxxxxxxxxx>]

For those who are interested, I have extracted a public interface that can
be used to visit the new AST.
The base interface is org.eclipse.cdt.core.dom.ast.IASTVisitor
There are 2 extensions:  org.eclipse.cdt.core.dom.ast.c.ICASTVisitor and
org.eclispse.cdt.core.dom.ast.cpp.ICPPASTVisitor

Use IASTTranslationUnit.getVisitor() to get an instance of the visitor.

-Andrew