consolidate API

[bwl21]

API shall be consolidated such that

high level api is provided by module Wortsammler

• wortsammler_execute shall use a hash similar to the wortsammler usage
• generate_documents - process documents according to manifest
• beautify_path - beautify documents on path (single file or array)
• load_manifest retrieve a manifest file
• collect_traces - collect races according to config (no support for collect traces in a single file)
• create_config(path) - create a mockup config based on path

This allows to do most of the things by Module Wortsammler alone without requiring the low level api.