Merge: Clean up naming in the code

This is a non functional change to clean up the function, variable, property and CSS key naming thoughout the source code.

Eleminating the possibility to model title name changes in the course of appearance of a newspaper was not yet properly reflected by function, variable, property and CSS key names and javadoc comments. Blocks in the course of appearance continued to carry the name *Title* which has become inappropriate. Javadoc comments still dealt title name canges which are no longer present in the code.

Functions, variables, property and CSS keys have been renamed. Related variables have been renamed, too. Javadoc comments have been revised. Furthermore, ExportBatchTask was renamed to ExportNewspaperBatchTask (because now there is a ExportSerialBatchTask, too) and CreateProcessesTask was renamed to CreateNewspaperProcessesTask (to better reflect what the class is actually doing).