Added unclutter package

bin/install-root

 #!/bin/bash
 # install necessary packages
-apt-get -y install enscript feh ghostscript gsfonts imagemagick imagemagick-6-common imagemagick-6.q16 libjpeg9 libjpeg-progs libjxr0:armhf libjxr-tools liblqr-1-0 libmagickcore-6.q16-3 libmagickcore-6.q16-3-extra libmagickwand-6.q16-3 libnetpbm10 libwmf0.2-7 netpbm poppler-utils python3-magic python-magic rclone zsh zsh-common
+apt-get -y install enscript feh ghostscript gsfonts imagemagick imagemagick-6-common imagemagick-6.q16 libjpeg9 libjpeg-progs libjxr0:armhf libjxr-tools liblqr-1-0 libmagickcore-6.q16-3 libmagickcore-6.q16-3-extra libmagickwand-6.q16-3 libnetpbm10 libwmf0.2-7 netpbm unclutter poppler-utils python3-magic python-magic rclone zsh zsh-common
 # fix cursor and screensaver
 /home/pi/kiosk/bin/change-file a /etc/lightdm/lightdm.conf 'xserver-command=X -nocursor -s 0 dpms'
 /home/pi/kiosk/bin/change-file a /etc/xdg/lxsession/LXDE/autostart '@xset s noblank' '@xset s off' '@xset -dpms'