1.3-dev1 - New features and reworked parts of the code

Hello! This is the biggest update to nafsdm yet, with over 1000 additions (GitHub additions). This is a minor dev release before we push to stable. As always, dev versions are mostly untested and should not be used in a production environment.

Full changelog:

• Upgrade scripts now check for "github_branch" to download correct latest version file.
• Upgrade scripts now return different exit codes depending on issue (dev versions will no longer crash the daemon due to unsupported version)
• Complete visual overhaul of nafsdmctl (looks a lot nicer)
• New development mode, allowing latest commit to always be installed on master and slave (not set version numbers).
• Slave: development functions are now enabled using the config.conf instead of adding files.
• Developer mode introduced in version 1.2.5-stable has been renamed to "skipVersionCheck"
• nafsdmctl: now has remove by domain and remove by ID functions
• nafsdmctl: now has status/start/stop/restart functions for the webinterface
• Slaves now report last connection time to master (nafsdmctl can show a table of which slaves has connected recently)
• nafscli logviewer no longer throws a traceback message on exit (using CTRL+C)
• Rewrote most log messages for both master and slave
• Ability to enable or disable nafsdm upgrades on start (if turned off, you will have to use nafscli upgrade) on slave daemon
• nafscli status now has -a argument which shows the full systemd status of the nafsdm daemon
• (minor): Update all copyright notices to 2018