* utility functions for shared info objects (count/timestamp)
* support for shared and DB info objects
* renamed functions reflecting using info objects now (no longer headers)
This will replace http header file timestamps
* read function in info reader has retrieval mode flag, unused parameters removed
* waitForDbInfoObjects/getDbInfoDataReader (added "Db"), there will be a 2nd reader
* CWebReaderFlags::DbInfoDataReader (added "Db")
* removed ps_read, only read (public)
* now ignore incomplete entities for airline/aircraft ICAOs from DB
* utility functions to find invalid designators
* adjusted unit test, avoid taking a random element
* and fixed 4 wrong ICAO entries in DB
* new read state "skipped"
* renamed to "isNetworkConnectedAndAccessible"
* checking before reading, which would only fail if network is not accessible
* split JsonDatastoreResponse in subclass HeaderResponse
* support for request newtwork request duration ("started") in application
* removed ps_setupChanged because it was unused
* utility function if web data are already available
* moved setOwnAircraftModel as reverseLookupAndUpdateOwnAircraftModel to CSimulatorCommon
* reverseLookupAndUpdateOwnAircraftModel also handles async lookup when data are not yet available
* removed context ps_allSwiftWebDataRead reverse lookup, done in CSimulatorCommon now
* added amit functions in readers
* cacheHasChanged functions (needed because data of caches are loaded in background)
* pinned small caches
* CDatabaseReader::readInBackgroundThread uses admitCaches now
* Ignore mode, not all applications need to load everything (mapping tool no airports)
* removed signal in airport reader which is already in base class
* added "virtual" keyword
* fixed another syncronize typo
* added allDbEntiiesUsed() to also reflect the config (ignore flag)
* ensure allSwiftDbData are signaled correctly even with ignore flag
* removed workaround in web data services
* removed convertFromDatabaseJson functions, not needed
* changed to use the correct static fromDatabaseJson functions
* fixed prefixes
* load correct Country object by loading it as nested object
* key and timestamp was missing in CAirport tuple metadata
* changed signature of ownAircraftModelChanged to model
* added function for a reverse lookup of a model (string->model) and use it when model changed
* renamed function to updateByLocalFileNames
