* some improved comments and information
* QMetaObject::invokeMethod in tool.cpp as thread safe invocation
* common base class for threaded readers
* removed event class, using QMetaObject::invoke instead for forcing calls in main event loop
* stop methods for readers, as used for graceful shutdown (preparing for thread safe destruction of objects)
* graceful shutdown for network context
* calls in tool now via inkoke for thread safety (only thread safe methods called directly)
* added class
* adjusted settings context
* adjusted "global" methods as register metadata
* improved settings utility
* renamed "settingsallclasses" as settings can also be in other namespaces, settingsallclasses now in core
* helper method to detect disconnected state
* clear ATC info if disconnected or not available
* unit test for "finders"
* added Doxygen file
* formatting frequency in text message tabs
* fixed QHostInfo::localHostName()
* move to BlackMisc, as it can be used elsewhere
* temp. change, moved methods in body until refs #278, #277 is fixed/ resolved
* added to CVariant for value object
* signal in text message to indicate overlay messages
* info window component (currently not runtme aware, maybe changed in future)
* removed old window, adjusted GUI
* Explicit JSON name can be set for tuple members
* Names can still be extracted by preprocessor stringification if not explicitly set
* In both cases, names are embedded in Attribute metadata, so no need to call jsonMembers() in the value classes
* An Attribute contains a reference to a data member, plus some metadata
* Creates the concept of a "meta tuple", a tuple of Attribute objects
* New facilities in TupleConverterBase to be used inside the macro
* Flags allow individual data members to be selectively enabled or disabled depending on how the tuple is used
* Selective enable/disable is implemented by removing the indices of the flagged members from the index_sequence
* new constructor in column class
* removed overridden data method, no longer needed
* added icons for ATC station views
* QPixmap comparison for such columns (free functions)
