v3.0.0

• upgrade jsxc to v3.0.0
• add experimental internal chat server
• add chat icon to oc header
• ignore empty bosh url on login
• do not use login overlay in oc >= 8.2
• refactore admin settings
• fix initial sidebar handling
• fix conflict with oc avatars
• modify csp (oc 9.0)
• set minimum required oc version to 8.0
• remove deprecated code and beautify
• add makefile
• fix turn credentials with secret