Sphinx-audeering-theme

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* Changed: link to infrastructure page in footer
* Changed: use always bold, black font for inline code
* Changed: use bold, black font for function/class name in API

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* Changed: intend after first line in API parameter lists

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* Fixed: parameter list in API was still showing bullet points
for some documentations

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* Fixed: bottom margin of table cells in API

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* Fixed: bottom margin of paragraphs in API

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* Changed: use new logo, favicon and colors from audEERING homepage
* Changed: link only to root of repo in Github/Gitlab links in the page header
* Changed: ``pygments`` style to ``friendly``
* Changed: remove border around code blocks
* Changed: inline code has no longer a background color or border
* Changed: let example section in API docs appear like other sections
* Changed: remove bullet points in API listings
* Changed: use only red or grey for admonitions
* Fixed: bottom margin for table headers