formating device managment
Merge pull request #24 from mladenw/ForEditing

For editing
Addredd References to main
Finishing Device Managment
Merge pull request #25 from mladenw/Mladens_Edit

Mladens edit
Merge pull request #26 from mladenw/ForEditing

For editing
Merge pull request #28 from mladenw/master

Sync with master