Modernized HTML Web Pages

The Tcl/Tk web pages for documentation (see Tcl/Tk 8.6 Manual) are retro-stylish. I think that even the quite simple web design of these pages – it's only a report, not even a documentation – is giving an impression of year 2017.

Nowadays the network has a high bit rate, so it's allowed to be more comprehensive and exact, when writing documentation. (But I must confess that writing documentation is also not my speciality, especially because I'm not a native English speaker – this is one of my first more comprehensive documents in English.)