(applied after 1st performance fix for cache was ready)
* utility functions to detect if only caches are used
* renamed some functions
* renamed some db flags and added new ones
* New hint flag: DB data for the client will no longer be web loaded but fetched from cache whenever possible
* No public constructors for the 2 classes
* adjusted main
* renamed files without "_"
* added flags
* integrated URL into global reader settings
* added new parameter for connectVatsimDataSignals
* removed unused setting in settings / network.h
* flags for readers (which reader is reading specific entities etc.)
* web data services: bundling multiple readers (webdataservices) and implementing IWebDataReaderProvider
* readers now able to read single entities