[DOCS] Update Settings.cfg

[alexander-nitsche]

• update copyright year
• include footer links to the TER page for installation and contact to conveniently guide the reader to all aspects of the extension

Related: https://github.com/TYPO3-Documentation/T3DocTeam/issues/182

[alexander-nitsche]

this pr has the same intention as pr #475 : guiding the reader conveniently to all aspects of the extension (full documentation, installation, version control, contact). this time for the full documentation footer.

[nhovratov]

Thank you very much!