Pulse2 4.0

• [FEATURE] Use xmpp to deliver messages, orders, etc
• [FEATURE] Add glpi 9.1 Support
• [FEATURE] Add a dashboard widget to follow backups
• [FEATURE] Add a dashboard widget to know the number of machines (total,
  online, offline)
• [BUGFIX] Fix Antivirus detection with latest glpi
• [BUGFIX] Fix user creation with latest glpi
• [BUGFIX] Fix port to php7