Introducing logging and lombok

See merge request !3

adding spring boot packaging such that it creates executable .jar file

reimplemented of how the application retrieves and stores data

See merge request !2

refactored the way of how application gets data from servers and how it stores them in application. The application does not save the data into files anymore, instead it keeps them in memory and uses them as soon as possible.

refactored so that now application stores data in string instead of saving it into the file (applies now to catalogue meta data as well)

refactored retrieving data. now the application returns the string instead of saving the result into file

adding input, radius, radiustype into JSON export structure, introducing OutputData such as the structure to represent values that should be exported

Refactored to Spring Boot

See merge request !1