Add build script for windows package

tools/make_windows_package.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# Run this script in the top nanopb directory to create a binary package
+# for Windows users. This script is designed to run under MingW/MSYS bash
+
+set -e
+set -x
+
+VERSION=`git describe --always`
+DEST=dist/$VERSION
+
+rm -rf $DEST
+mkdir -p $DEST
+
+# Export the files from newest commit
+git archive HEAD | tar x -C $DEST
+
+# Rebuild the Python .proto files
+make -BC $DEST/generator/proto
+
+# Make the nanopb generator available as a protoc plugin
+cp $DEST/generator/nanopb_generator.py $DEST/generator/protoc-gen-nanopb.py
+
+# Package the Python libraries
+( cd $DEST/generator; bbfreeze nanopb_generator.py protoc-gen-nanopb.py )
+mv $DEST/generator/dist $DEST/generator-bin
+
+# Remove temp file
+rm $DEST/generator/protoc-gen-nanopb.py
+
+# Package the protoc compiler
+cp `which protoc`.exe $DEST/generator-bin/
+