* removed iconForModel from interface and aircraft config parser
* CPixmap support for loading pixmap from file
* Access to model of model set loader by model string
* icon path as member of CAircraftModel
The following issues were fixed
* Fixed wrong/missing namespaces
* Fixed obvious typos in documentation
* Documentation not in sync with source code
refs #544
* made plugin aware functions protected
* set setup for FSX ( refs #547 ) and made setup protected
* removed CLogHandler::instance()->disconnect(); as discussed in slack
* some formatting