jav/initial.txt no longer needed
- added initial classes of java
- standard build of first page is done
- components of second page added but not in the right order yet
- open dialoges for single file, multiple file and folders worked
- preferences gui window implemented (but so far without functionality)
- main gui window works (not all functions implemented yet -> look at TODO)
- preferences class implemented, saves all needed preferences in a text file
- segmentation class as initial start class added