[autodoc] new autodoc

These commits will add a modern autodoc output.
The new output is based on [bootstrap](https://github.com/twbs/bootstrap) and [DataTables](https://github.com/DataTables).

Features:
- search
- filter commands by group level and plugin
- pagination

Internal changes on B3:
- removed the old ugly html code from the python file (more readable, more flexibility,  saves ~140kb memory ;) )
- use html template file (support for the old and new html style)

What is missing:
- [ ] review
- [ ] simple tests