Can build AppImages more successfully.

- The meta/Recipes script doesn't run the post-install of debian
  packages, so some weren't installed correctly.
- This scheme lets vigil install into a container as usual.
- The files in the AppDir are calculated as the difference between
  the files in the initial debootstrapped container, and the
  container after the installation.

appimage/AppRun

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+
+# This is a modified version of the AppRun made by AppImage's meta/Recipe.
+
+
+set -e
+
+
+HERE="$(dirname "$(readlink -f "${0}")")"
+export UNION_PRELOAD="${HERE}"
+export LD_PRELOAD="${HERE}/libunionpreload.so"
+export LD_LIBRARY_PATH="${HERE}"/usr/lib/:"${HERE}"/usr/lib/i386-linux-gnu/:"${HERE}"/usr/lib/x86_64-linux-gnu/:"${HERE}"/usr/lib32/:"${HERE}"/usr/lib64/:"${HERE}"/lib/:"${HERE}"/lib/i386-linux-gnu/:"${HERE}"/lib/x86_64-linux-gnu/:"${HERE}"/lib32/:"${HERE}"/lib64/:"${LD_LIBRARY_PATH}"
+export PYTHONPATH="/usr/local/lib/python3.5/dist-packages:${HERE}"/usr/share/pyshared/:"${PYTHONPATH}"
+export XDG_DATA_DIRS="${HERE}"/usr/share/:"${XDG_DATA_DIRS}"
+export PERLLIB="${HERE}"/usr/share/perl5/:"${HERE}"/usr/lib/perl5/:"${PERLLIB}"
+export GSETTINGS_SCHEMA_DIR="${HERE}"/usr/share/glib-2.0/schemas/:"${GSETTINGS_SCHEMA_DIR}"
+export QT_PLUGIN_PATH="${HERE}"/usr/lib/qt4/plugins/:"${HERE}"/usr/lib/i386-linux-gnu/qt4/plugins/:"${HERE}"/usr/lib/x86_64-linux-gnu/qt4/plugins/:"${HERE}"/usr/lib32/qt4/plugins/:"${HERE}"/usr/lib64/qt4/plugins/:"${HERE}"/usr/lib/qt5/plugins/:"${HERE}"/usr/lib/i386-linux-gnu/qt5/plugins/:"${HERE}"/usr/lib/x86_64-linux-gnu/qt5/plugins/:"${HERE}"/usr/lib32/qt5/plugins/:"${HERE}"/usr/lib64/qt5/plugins/:"${QT_PLUGIN_PATH}"
+EXEC=$(grep -e '^Exec=.*' "${HERE}"/*.desktop | head -n 1 | cut -d "=" -f 2- | sed -e 's|%.||g')
+exec ${EXEC} $@