Added possibility to disable devices management for ordinary users
Fixed NPE when removing device
Added new 'disallow device management' feature to readme
Added new setting - idle speed threshold. If speed is below it's value then device is considered idle. By default is it zero.
Updated info about 'Idle' feature
Synced artifact version and DB drivers versions with upstream
Merge branch 'master' into dev
Merge branch 'dev' into adpopup