* the reader will be used in context, but can also be used standalone (ie mapping GUI) GUI
* adjustments in context/airspace as required
** for web reader
** livery
* base class for database based reading (via JSON/web)
* model data reader for models
* GUI component for aircraft parts
* remote aircraft selector component
* Adjusted GUI for internals component
* Enable / disable debug messages from GUI
* Allow to init engines directly
* Removed unused async sort in sequence
In same step fixed found issues in interpolator
* allow to set max rendered aircraft
* refactored to member initialization
* adjusted asserts
* adjusted isXXObject methods
* changed create method for ContextNetwork to support empty context
* empty status message used as return value in empty context
* usingLocalObjects() now derived from runtime config, no need to override it in contexts
* getRuntime in base class, no longer to implement it in each context class