windows: Fix setting maximum size of VMNetX window
windows: Change libjpeg boolean width to match platform default

Fixes crashes with spice-gtk.
windows: Install pywin32 binary distribution during setup

We can't build it from source because that requires MSVC.
windows: Install PyInstaller during setup
windows: Rename bindir to "app"

We've been doing this in the bdist zipball; do it in the install root as
well.  It's needed to prevent
g_win32_get_package_installation_directory_of_module() from searching
in bindir's parent directory.
windows: Stop generating VERSIONS.txt

The binary package will be distributed to users who won't care about the
versions of our dependencies.
windows: Stop generating binary ZIP
windows: Build initial PyInstaller bundle
windows: Distribute GStreamer plugins
windows: Drop unnecessary cleanup commands

PyInstaller ignores C headers and .dll.a/.la files.
windows: Drop comprehensive artifact lists from build.sh

Artifacts are now autodetected by PyInstaller or enumerated in
vmnetx.spec.in.  Reduce the build.sh artifact lists to a single
representative file per package as a build stamp.

Also stop copying artifacts from other directories into the app
directory, since PyInstaller doesn't look for them there.
windows: Distribute license texts again
windows: Strip DLLs to save space
windows: Distribute VMNetX README.icon with licenses
windows: Set application icon

The .ico file should be constructed at build time from the icon PNG using
something like:

    convert "${root}/share/icons/hicolor/256x256/apps/vmnetx.png" \
        \( -clone 0 -resize 16x16 \) \
        \( -clone 0 -resize 24x24 \) \
        \( -clone 0 -resize 32x32 \) \
        \( -clone 0 -resize 40x40 \) \
        \( -clone 0 -resize 48x48 \) \
        \( -clone 0 -resize 64x64 \) \
        \( -clone 0 \) -delete 0 \
        vmnetx.ico

However, the dependencies of the Cygwin ImageMagick package are totally
broken, and we don't want to have to track them by hand in ${cygtools}.
windows: Add version resource to vmnetx.exe