Cleaning.
Add updated version of pngchunkinsert.sh and its counterpart.
wallpaper_setter.sh bugfixes and update

Add -i key to the ‘client’ to show path to the current wallpaper.

Add debug output.

Add versioning.

Make advance to two-step confirmation in the protocol
    1. command accepted;
    2. command executed successfully.

Improve results that some functions returned. Not minding this was
    the cause of the bug when wallpaper was set twice.
wallpaper_setter.sh version bump
Updates to thunar_ca.sh and screenshot.sh

Remove of --roll-up in thunar_ca.sh in favor of thunar-archive-plugin.

Update screenshot.sh, rewrite the internal code, repair the area mode,
    add conversion to the indexed colours.