engine to actually handle all the svg-files and provide an interface for manipulating those

It is essential to have an engine (a "motor") that handles the different images we have.

The engine shall do anything we don't want to worry about in our main memaker code where the GUI is defined.
The engine shall provide a high-level interface for our program to interact with the svg-files.
We just want to tell it to add a certain feature or remove/replace/move/raise/lower/$manipulate it.
The engine is the part of our program that actually interacts with the xml-parser.

(This blueprint as been registered again)