0.9.7 Stable OS Stretch and Jessie

• Adding a Settings page in the web app to control features like 'idle shutdown' and 'max volume' and toggle systemd services
• Documentation / troubleshooting / tricks: how to install via ssh, improve on board audio quality and the like
• Adding auto shutdown when idle for longer than x minutes (see manual for details)
• Adding maximum volume percent to settings (see manual for details)
• Fixing bug: settings volume for stereo audio iFace
• Fixing bug: bash code compatible with all shells
• Web app enhancements (audio level, display 'playing now')