Broken links / 404

[skjerns]

There are quite a few broken links on the psychtoolbox.org website. Many of those are within the docs due to wrong rendering, but many others to external sites also don't work (related: #16 )

Might be an idea to fix those?

psychtoolbox404.csv

Excerpt (full list in CSV)

Source URL	Linked Resource	Status	Size	Count
http://psychtoolbox.org	{	404 Not Found	10	1
http://psychtoolbox.org/overview.html	../grants	404 Not Found	132	14
http://psychtoolbox.org/news.html	https://gstreamer.freedesktop.org/data/pkg/windows/1.18.0/msvc/gstreamer-1.0-msvc-x86_64-1.18.0.msi	404 Not Found	5752	2
http://psychtoolbox.org/news.html	https://gstreamer.freedesktop.org/data/pkg/windows/1.16.0/gstreamer-1.0-msvc-x86_64-1.16.0.msi	404 Not Found	6404	8
http://psychtoolbox.org/news.html	http://psychtoolbox.org/wikka.php?wakka=PsychPortAudio	404 Not Found	11655	21
http://psychtoolbox.org/download.html	https://gstreamer.freedesktop.org/data/pkg/windows/1.22.5/msvc/gstreamer-1.0-msvc-x86_64-1.22.5.msi	404 Not Found	278	6
http://psychtoolbox.org/docs/Psychtoolbox.html	{	404 Not Found	10	1
http://psychtoolbox.org/docs/Psychtoolbox.html	PsychoPy	404 Not Found	85	53
http://psychtoolbox.org/docs/Psychtoolbox.html	OpenWindow	404 Not Found	113	29
http://psychtoolbox.org/docs/Psychtoolbox.html	OpenGL	404 Not Found	140	59