Split off all HTML generation code from codemetapy 2.4.1 (https://github.com/proycon/codemetapy) into this new project:
* allow full static site generation
* new styling: cards make better use of available screen space
* added Table of Contents for service index
* implemented client-side filtering (https://github.com/proycon/codemetapy/issues/23)
* improved RDFa representations
* various fixes and style improvements