Add the Ontology Verbalisation Module; Fix PyPI layout.

An ontology verbalisation tool (see everything in deeponto.onto.verbalisation) is introduced in this release, along with a syntax parser and a datastructure called RangeNode. This verbalisation tool supports a limited set of class expression patterns, but is suitable for common complex class expressions without too many nested levels.

The layout indexed in PyPI was faulty in the previous release and is now fixed.