Updated Dutch translations
Fixing encoding issues
Squashing commits for disabling zoom buttons feature
Merge pull request #2702 from timvandermeij/updated-dutch-translations

Updated Dutch translations
Merge pull request #2707 from timvandermeij/disable-zoom-buttons

Disabling zoom buttons if zooming in or out is not possible anymore.
add imageLayer

add optional imageLayer object to access images and there
position and size as they are rendered on the canvas.