fixed problem when loading ini files from payload zips
created stub for new image2port node
Implemented image2file port node incl. some cleanups
Merge branch 'feature/image-port-to-file-node' into develop
updated some of the icons with icon from the tango project
 * added tango to LICENSE
 * added Björn and me to authors
 * updated README to new project name
Merge branch 'feature/icon-replacement' into develop