Switch plugin to Eclipse AST instead of DTangler

[romani]

Dtangler in only good to start project and test that UI tables could be created like in competitors - to make plugin be reasonable to exists.
Whole idea of DSM is convenience to examine big projects quickly.

But with Dtangler we are limited to clam dependency on file/class only ! But user need to see where this dependency used in file - so for this we need to use Eclipse AST model.

see http://www.vogella.com/articles/EclipseJDT/article.html
and http://www.eclipse.org/jdt/ui/astview/index.php

This is task is huge ambition - so it need to be done only after success in convenient UI rendering.