Genzel breadcrumbs

Breadcrumb is a way for visitors keep track thier location. The plugin implements few main ideas:
* Menu is a key to all site structure.
* Possibility to mount groups articles to defined points of site tree.
* Possibility to drive breadcrumb.

The key feature is configuring breadcrumb by defining special rules. It can looks like this:
front menu:fin tax:post_tag current
Where each token define part of trail.