Added README and release script for mingw build

Author: tatsuhiro-t

README.mingw

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+aria2 Windows build
+===================
+
+aria2 Windows build is provided in 2 flavors: 32bit version and 64bit
+version. The executable was compiled using mingw-w64 cross compiler on
+Debian Linux.
+
+* gcc-mingw-w64               4.6.2-14+3
+* binutils-mingw-w64-i686     2.22-1+1
+* binutils-mingw-w64-x86-64   2.22-1+1
+
+The executable is statically linked, so no extra DLLs are
+necessary. The linked libraries are:
+
+* openssl 1.0.0h
+* expat 2.1.0
+* sqlite 3.7.11
+* zlib 1.2.6
+* c-ares 1.7.5
+
+This build has the following difference from the original release:
+
+* 32bit version only: ``--disable-ipv6`` is enabled by default. (In
+  other words, IPv6 support is disabled by default).
+
+Known Issues
+------------
+
+* When Ctrl-C is pressed, aria2 shows "Shutdown sequence
+  commencing... Press Ctrl-C again for emergency shutdown." But
+  mingw32 build cannot handle second Ctrl-C properly. The second
+  Ctrl-C just kills aria2 instantly without proper shutdown sequence
+  and you may lose data. So don't press Ctrl-C twice.
+
+* --daemon option doesn't work.
+
+* 32bit version only: When ``--disable-ipv6=false`` is given,
+  BitTorrent DHT may not work properly.
+
+* 32bit version only: Most of the IPv6 functionality does not work
+even if ``--disable-ipv6=false`` is given.
+
+References
+----------
+
+* http://smithii.com/aria2
+* http://kemovitra.blogspot.com/2009/12/download-aria2-163.html

mingw-release

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+#!/bin/sh -e
+
+# aria2 - The high speed download utility
+#
+# Copyright (C) 2012 Tatsuhiro Tsujikawa
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# In addition, as a special exception, the copyright holders give
+# permission to link the code of portions of this program with the
+# OpenSSL library under certain conditions as described in each
+# individual source file, and distribute linked combinations
+# including the two.
+# You must obey the GNU General Public License in all respects
+# for all of the code used other than OpenSSL.  If you modify
+# file(s) with this exception, you may extend this exception to your
+# version of the file(s), but you are not obligated to do so.  If you
+# do not wish to do so, delete this exception statement from your
+# version.  If you delete this exception statement from all source
+# files in the program, then also delete it here.
+
+test -z "$HOST" && HOST=i686-w64-mingw32
+test -z "$BUILD_VER" && BUILD_VER=1
+
+. ./script-helper
+
+get_version
+
+if [ -z "$VERSION" ]; then
+    echo "No version found"
+    exit 1
+fi
+
+DIST_DIR=aria2-${VERSION}-${HOST}-build${BUILD_VER}
+
+/usr/bin/$HOST-strip src/aria2c.exe
+mkdir $DIST_DIR
+cp AUTHORS COPYING ChangeLog LICENSE.OpenSSL NEWS README.html README.mingw \
+    src/aria2c.exe $DIST_DIR
+zip -9 -r $DIST_DIR.zip $DIST_DIR
+rm -rf $DIST_DIR

script-helper

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+# aria2 - The high speed download utility
+#
+# Copyright (C) 2012 Tatsuhiro Tsujikawa
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# In addition, as a special exception, the copyright holders give
+# permission to link the code of portions of this program with the
+# OpenSSL library under certain conditions as described in each
+# individual source file, and distribute linked combinations
+# including the two.
+# You must obey the GNU General Public License in all respects
+# for all of the code used other than OpenSSL.  If you modify
+# file(s) with this exception, you may extend this exception to your
+# version of the file(s), but you are not obligated to do so.  If you
+# do not wish to do so, delete this exception statement from your
+# version.  If you delete this exception statement from all source
+# files in the program, then also delete it here.
+
+get_version () {
+  VERSION=`grep AC_INIT configure.ac | sed '/AC_INIT/ s/AC_INIT(\[aria2\],\[\([^]]\+\)\],.*/\1/'`
+  echo "Version: $VERSION"
+}