accessibility of scicomp.aalto.fi

[eglerean]

This issue to track changes that are still needed for improving accessibility of our website. We can leave this issue open indefinitely to also track future requests and changes to accessibility of scicomp.aalto.fi.

• Fixed two remaining contrast issues by updating https://github.com/AaltoSciComp/sphinx_rtd_theme_ext_color_contrast
• Adding an accessibility statement. See pull request adding accessibility statement #212
• Search box misses label tag. I have proposed a solution to rtd_theme to fix issue: Search input boxes lack labels readthedocs/sphinx_rtd_theme#970
• There are links to PDF files and we could be explicit about them OR add HTML version of those files.
• Test scicomp.aalto.fi with Mac OSx VoiceOver technology (on Chrome) and add to the statement
• Test scicomp.aalto.fi with assistive technology NVDA on the latest version of the Windows 10 and add to the statement