Add Raspbian stages

stage4/00-install-packages/00-debconf

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+# Enable realtime process priority?
+jackd2  jackd/tweak_rt_limits   boolean true
+# Do you accept the Wolfram - Raspberry Pi® Bundle License Agreement?
+wolfram-engine  shared/accepted-wolfram-eula    boolean true

stage4/00-install-packages/00-packages

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+java-common oracle-java8-jdk
+libreoffice-sdbc-hsqldb
+sonic-pi
+python idle python3-pygame python-pygame python-tk
+python3 idle3 python3-tk
+python3-rpi.gpio
+python3-pgzero
+python-serial python3-serial
+python-picamera python3-picamera
+debian-reference-en dillo x2x
+wolfram-engine
+raspberrypi-net-mods raspberrypi-ui-mods
+smartsim penguinspuzzle
+python-pip python3-pip
+python3-numpy
+pypy
+python3-pifacecommon python3-pifacedigitalio python3-pifacedigital-scratch-handler python-pifacecommon python-pifacedigitalio
+minecraft-pi python-minecraftpi
+alacarte rc-gui sense-hat
+claws-mail
+tree
+scratch nuscratch
+greenfoot bluej
+nodered
+python-gpiozero python3-gpiozero
+raspi-gpio
+libgl1-mesa-dri libgles1-mesa libgles2-mesa xcompmgr

stage4/00-install-packages/00-packages-nr

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+libreoffice libreoffice-gtk
+timidity
+pi-package