* friend CRuntime on top
* fixed some public constructors (made protected)
* Also made registerWithDBus protected
* Fixed some copy/paste issues in getIContextXXX
* Reordered private/public sections
* removed usingLocalObjects() now in CContext
* removed getRuntime() now in CContext
* Constructors no longer public, context can only be obtained via runtime object
* runtime class is friend class
CContextSimulator::ownAircraft was not a public slot and therefore
not available via DBus. In the same step renamed the method
to getOwnAircraft to be consistent.
IContextSimulator is implememted similar to the other contexts.
It defines a small set of methods as a starter. More will
be added later when the concept is proofen to work.
refs #135