speedo: Revamped speedo and include a w32 installer.
* build-aux/speedo/: New. * build-aux/speedo/w32/: New.
The new installer uses some code from Gpg4win but is much smaller and
easier to maintain. To build an installer, unpack GnuPG and then run
make -f build-aux/speedo.mk TARBALLS=~/mytarballs installer
~/mytarballs is a directory with tarballs of external libraries. See
speedo.mk for a list of them.
WARNING: The installed W32 version does not correctly work right now.