Add AppImage tooling

* Use icon from local repository
  PowerShell#2027 (comment)

* Use the deb that has been generated in this build

* Copyright and license
  PowerShell#2027 (comment)

* MIT License for appimage.sh
  PowerShell#2027 (comment)

* Full text of the MIT License is in license_thirdparty_proprietary.txt

* Clarify license and clean up unused code
  PowerShell#2027 (comment)

* Mark appimage.sh as executable

license_thirdparty_proprietary.txt

@@ -720,4 +720,25 @@ EFFET JURIDIQUE. Le présent contrat décrit certains droits juridiques. Vous po
 prévus par les lois de votre pays. Le présent contrat ne modifie pas les droits que vous confèrent les lois 
 de votre pays si celles-ci ne le permettent pas.
 
-
+The following components are governed by the MIT license, a copy of which appears 
+below the list of components:  
+------------------------------------------------------
+tools/appimage.sh
+------------------------------------------------------
+Copyright (c) 2016 Simon Peter
+All rights reserved. 
+MIT License
+Permission is hereby granted, free of charge, to any person obtaining a copy of this 
+software and associated documentation files (the "Software"), to deal in the Software 
+without restriction, including without limitation the rights to use, copy, modify, 
+merge, publish, distribute, sublicense, and/or sell copies of the Software, and to 
+permit persons to whom the Software is furnished to do so, subject to the following 
+conditions:
+The above copyright notice and this permission notice shall be included in all copies 
+or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
+OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

tools/appimage.sh

@@ -0,0 +1,141 @@
+#!/bin/bash
+
+# This code is based on an example recipe from the AppImage project,
+# https://github.com/probonopd/AppImages/blob/e05cbebc62c86f8c602d74d9050bbfbf10df1c69/recipes/powershell/Recipe
+# Copyright (c) 2016 Simon Peter
+# The license of this code and of https://github.com/probonopd/AppImages/raw/e05cbebc62c86f8c602d74d9050bbfbf10df1c69/functions.sh
+# is the MIT License, see https://github.com/probonopd/AppImages/blob/e05cbebc62c86f8c602d74d9050bbfbf10df1c69/LICENSE
+#
+# Generate AppImage, http://appimage.org
+#
+# The resulting PowerShell AppImage is known to run on
+# CentOS-7.0-1406-x86_64-GnomeLive.iso
+# CentOS-7-x86_64-LiveGNOME-1511.iso
+# Chromixium-1.5-amd64.iso
+# Fedora-Live-Workstation-x86_64-22-3.iso
+# Fedora-Live-Workstation-x86_64-23-10.iso
+# SL-72-x86_64-2016-02-03-LiveDVDgnome.iso
+# debian-live-8.0.0-amd64-xfce-desktop+nonfree.iso
+# debian-live-8.4.0-amd64-gnome-desktop.iso
+# elementary_OS_0.3_freya_amd64.iso
+# kali-linux-2.0-amd64.iso
+# kali-linux-2016.1-amd64.iso
+# kubuntu-14.04.4-desktop-amd64.iso
+# kubuntu-15.04-desktop-amd64.iso
+# kubuntu-16.04-desktop-amd64.iso
+# linuxmint-17.3-cinnamon-64bit.iso
+# neon-devedition-gitunstable-20160814-0806-amd64.iso
+# netrunner-17-64bit.iso
+# ubuntu-14.04.1-desktop-amd64.iso
+# ubuntu-16.04-desktop-amd64.iso
+# ubuntu-gnome-16.04-desktop-amd64.iso
+# ubuntu-mate-16.04-desktop-amd64.iso
+# xubuntu-16.04-desktop-amd64.iso
+
+APP=powershell
+
+mkdir -p ./$APP/$APP.AppDir/usr/lib
+
+cd ./$APP/
+
+wget -q https://github.com/probonopd/AppImages/raw/e05cbebc62c86f8c602d74d9050bbfbf10df1c69/functions.sh -O ./functions.sh
+. ./functions.sh
+
+# We get this app and almost all its dependencies via apt-get
+# but not using the host system's information about what is
+# installed on the system but our own assumptions instead
+
+mkdir -p ./tmp/archives/
+mkdir -p ./tmp/lists/partial
+touch tmp/pkgcache.bin tmp/srcpkgcache.bin
+
+generate_status
+
+echo "deb http://archive.ubuntu.com/ubuntu/ trusty main universe
+" > sources.list
+
+OPTIONS="-o Debug::NoLocking=1
+-o APT::Cache-Limit=125829120
+-o Dir::Etc::sourcelist=./sources.list
+-o Dir::State=./tmp
+-o Dir::Cache=./tmp
+-o Dir::State::status=./status
+-o Dir::Etc::sourceparts=-
+-o APT::Get::List-Cleanup=0
+-o APT::Get::AllowUnauthenticated=1
+-o Debug::pkgProblemResolver=true
+-o Debug::pkgDepCache::AutoInstall=true
+-o APT::Install-Recommends=0
+-o APT::Install-Suggests=0
+"
+
+cp ../powershell_*_amd64.deb .
+
+# Add local repository so that we can install deb files
+# that were downloaded outside of a repository
+dpkg-scanpackages . /dev/null | gzip -9c > Packages.gz
+echo "deb file:$(readlink -e $PWD) ./" >> sources.list
+
+apt-get $OPTIONS update
+
+URLS=$(apt-get $OPTIONS -y install --print-uris $APP | cut -d "'" -f 2 | grep -e "^http")
+
+wget -c $URLS
+
+cd ./$APP.AppDir/
+
+find ../*.deb -exec dpkg -x {} . \; || true
+
+rm usr/bin/powershell
+mv opt/microsoft/powershell/*/* usr/bin/
+
+cat > $APP.desktop <<\EOF
+[Desktop Entry]
+Name=PowerShell
+Comment=Microsoft PowerShell
+Exec=powershell
+Keywords=shell;prompt;command;commandline;cmd;
+Icon=powershell
+Type=Application
+Categories=System;TerminalEmulator;
+StartupNotify=true
+Terminal=true
+EOF
+
+cp ../../assets/Powershell_256.png $APP.png
+
+cat > ./AppRun <<\EOF
+#!/bin/sh
+HERE=$(dirname $(readlink -f "${0}"))
+export PATH="${HERE}/usr/bin/":$PATH
+export LD_LIBRARY_PATH="${HERE}/usr/lib/":$LD_LIBRARY_PATH
+exec "${HERE}/usr/bin/powershell.wrapper" "$@"
+EOF
+chmod a+x ./AppRun
+
+move_lib
+mv ./usr/lib/x86_64-linux-gnu/* ./usr/lib/ # AppRun sets Qt env here
+
+mv ./usr/lib/pulseaudio/*.so usr/lib/ || true
+
+mv usr/local/share/man usr/share/ || true
+
+delete_blacklisted
+rm -rf ./etc/ ./home/ ./lib/ || true
+rm -r opt/ usr/lib/x86_64-linux-gnu/ usr/lib64 usr/share/ || true
+
+VERSION=$(find ../*.deb -name $APP"_*" | head -n 1 | cut -d "~" -f 1 | cut -d "_" -f 2 | cut -d "-" -f 1-2 | sed -e 's|1%3a||g')
+echo $VERSION
+
+get_desktopintegration $APP
+sed -i -e 's|^echo|# echo|g' usr/bin/$APP.wrapper # Make less verbose
+
+# Go out of AppImage
+cd ..
+
+ARCH="x86_64"
+generate_appimage
+
+cp ../out/*AppImage ..
+
+cd ..