* Change the ordering of 'make install' so that directories and
permissions are set first
* Use wildcard to copy service files to systemd directory as 'install'
was failing when there was @ in the script
* Update systemd units files based on
https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/ for
starting the onedrive service
* Update single user file so that it requries the network to be online
before the service starts
* Create a multi-user service file for multi-user environments with each
user having their own onedrive account configuration (#321) - file
provided by @sbocquet
