Add packaging script's

info of packaging_script Debian, Ubuntu, Windows
https://qelectrotech.org/wiki_new/doc/packaging_debian#packaging_script_debian_ubuntu_windows

Laurent,
can you check the scripts if they work now,
I'll then change them to scripts that can handle git Submodules

packaging_script_AppImage.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+#set -x
+
+#delete old qet.h
+rm sources/qet.h
+
+cd sources
+git reset --hard origin/master
+
+cd ..
+git pull
+sed -i 's/DEFINES += QET_EXPORT_PROJECT_DB/#DEFINES += QET_EXPORT_PROJECT_DB/' qelectrotech.pro
+
+GITCOMMIT=$(git rev-parse --short HEAD)
+A=$(git rev-list HEAD --count)
+HEAD=$(($A+473))
+
+VERSION=$(cat sources/qet.h | grep "const QString version" | cut -d\" -f2 | cut -d\" -f1)          #Find version tag in GIT sources/qet.h
+tagName=$(cat sources/qet.h | grep displayedVersion | cut -d\" -f2 | cut -d\" -f1)                 #Find displayedVersion tag in GIT sources/qet.h
+
+# recupere le numero de la nouvelle revision
+#revAp=$(svnversion | cut -d : -f 2 | tr -d '[:alpha:]')
+
+# On recupere le numero de version de l'originale
+tagName=$(sed -n "s/const QString displayedVersion =\(.*\)/\1/p" sources/qet.h | cut -d\" -f2 | cut -d\" -f1 )
+
+# On modifie l'originale avec le numéro de révision du dépôt GIT
+sed -i 's/'"const QString displayedVersion =.*/const QString displayedVersion = \"$tagName+$GITCOMMIT\";"'/' sources/qet.h
+
+rm -Rf build/
+mkdir build && cd build
+
+qmake ../qelectrotech.pro
+make -j48
+
+cd ../appdir/
+rm qelectrotech/usr/bin/qelectrotech
+rm -Rf qelectrotech/usr/{lib,plugins}
+rm -Rf qelectrotech/usr/share/{elements,examples,titleblocks,lang,man,doc}
+
+cp ../build/qelectrotech qelectrotech/usr/bin/
+cp -r ../{elements,examples,titleblocks,lang,man} qelectrotech/usr/share/
+
+./linuxdeployqt-continuous-x86_64.AppImage qelectrotech/usr/share/qelectrotech.desktop  -appimage -bundle-non-qt-libs -verbose=1 -extra-plugins=iconengines
+rm qelectrotech/AppRun
+sed -i 's/'"QElectroTech_0.8-DEV.*/QElectroTech_0.8-DEV-r"$HEAD""'/' qelectrotech/qelectrotech.desktop
+cp AppRun qelectrotech/
+rm QElectroTech_*.AppImage
+
+ARCH=x86_64 ./appimagetool-x86_64.AppImage qelectrotech
+chmod -x QElectroTech_0.8-DEV-r$HEAD-x86_64.AppImage