* common base class for DB based classes
* common base class for DB based containers
* Livery, distributor value class
* adjusted value classes to livery
* utility functions for DB values (blackmisc free functions)
* register new objects with metadata system
(similar to remote aircraft provider)
* removed references
* made own aircraft context thread safe (reg. own aircrat data)
* removed the read only versions of the provider
* adjusted consuming methods
* renamed some functions ("ownAircraft...") to avoid ambiguity (with remote aircraft)
* preparation for a context menu to send text messages from ATC/aircraft view
* preparation for context menu for fast pos. updates
* reverse ICAO lookup at login screen
* display fast updates / parts in GUI
* moved max- aircraft into settings
* made serverselection own component
