taking over ownership
Make systemd use PID file provided by btsync
Add per-user service

Most of the post_install output was shamelessly stolen from the btsync
package in AUR: https://aur.archlinux.org/packages/btsync/
Merge branch 'emlun-test'

Merging emlun's changes, first set
Merge branch 'master' of github.com:serialhex/bittorrent-sync