Docs: Remove dependencies from installation docs

We already have the requirements for that.
Styleguide cleanups
Drop web interface

It was never used.

From now we are going to use a HTML, CSS, JS approach that will query the
public amaGama API that dynamically builds the results page on the client
browser. Such approach will reduce the size of amaGama and possibly reduce
the server load.

This commit includes a tweak on the requirements to keep the documentation
requirements working properly.
IN PROGRESS:        Drop theoretically unused API

Must check before dropping.
IN PROGRESS:        Drop jsonwrapper, which I have no idea why it is here
IN PROGRESS:        Drop weird view that overlaps with another one.

Not sure why we provide this way to query, since we have the another.

Must check before dropping.
UNDO