Wiki pages are outdated

[cjcolvar]

Descriptive summary

The wiki pages are very outdated and provide incorrect information about how this gem works. These need to be updated or deprecated. Here are the ones I noticed at a quick glance:

https://github.com/samvera/hydra-head/wiki/Access-Controls-with-Hydra
https://github.com/samvera/hydra-head/wiki/How-to-Get-Started
https://github.com/samvera/hydra-head/wiki/Rake-Tasks-in-Hydra-Head
https://github.com/samvera/hydra-head/wiki/Filtering-search-results-with-hydra-access-controls
https://github.com/samvera/hydra-head/wiki/Access-Controls
https://github.com/samvera/hydra-head/wiki/File-uploads
https://github.com/samvera/hydra-head/wiki/File-downloads
https://github.com/samvera/hydra-head/wiki/Configuring-solr-and-fedora
https://github.com/samvera/hydra-head/wiki/For-Contributors

Broken links to the duraspace wiki:

https://wiki.duraspace.org/display/hydra/Technical+Framework+and+its+Parts
https://wiki.duraspace.org/display/hydra/Deployment+Hardware+Information