Styling
Complete re-write for RT 4.2.x

*   Made the code compatible to Request Tracker 4.2.x (breaks with 4.0.x)
*   Switched from username/password authentication to i-doit API key
*   Added view for requestor's linked devices including installed software components
*   Renamed some tabs for better understanding
*   Shared code with OTRS Help Desk extension to be more maintainable
*   Renamed configuration options for default view

Work still in progress...