I've added installation instructions for both the package and service. However, the language is somewhat informal. (The instructions, while may seem unclear to someone not familiar with NixOS, should actually be perfectly clear to anybody using NixOS, while being brief along the lines of other Distros)
* Update documentation links to use full URL so when readme.md is used on Docker Hub, links work and do not generate a 404
* Update LDC version in documentation
* Move lots of stuff into contrib directory to clean up root folder
* Update autoconf files for new location of some files
* Refactor README split and move to docs directory
* Update INSTALL.md
* Update Makefile.in
* Install docs from new location
* Uninstall docs correctly
* Update Dockerfile
* Fix up Dockerfile spacing
* Move systemd stuff to contrib
* Move docker specific stuff to contrib/docker, update docs
* Fix Alpine and Stretch docker files
* Update configure after changed file locations
* Update INSTALL.md to include pkg-config as requirement
* Move also entrypoint.sh to contrib/docker
* Update 'min-notif-changes' to 'min-notify-changes' which was missed in PR #467
* Update to add --sync-root-files to usage.md and man page
* Update usage.md to include --auth-files ARG details
