Add script to build client.

build.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+version=`grep 'const version = ' ./shadowsocks/util.go | sed -e 's/.*= //' | sed -e 's/"//g'`
+echo "creating shadowsocks binary version $version"
+
+export CGO_ENABLED=0
+
+cur=`pwd`
+bindir=$cur/bin
+mkdir -p $bindir
+
+build() {
+    local name
+    local GOOS
+    local GOARCH
+
+    prog=shadowsocks-$4
+    pushd cmd/$prog
+    name=$prog-$3-$version
+    echo "building $name"
+    GOOS=$1 GOARCH=$2 go build -a || exit 1
+    if [[ $1 == "windows" ]]; then
+        zip $name.zip $prog.exe
+        rm -f $prog.exe
+        mv $name.zip $bindir
+    else 
+        mv $prog $name
+        gzip -f $name
+        mv $name.gz $bindir
+    fi
+    popd
+}
+
+build darwin amd64 mac64 local
+build linux amd64 linux64 local
+build linux 386 linux32 local
+build windows amd64 win64 local
+build windows 386 win32 local
+
+#build darwin amd64 mac64 server
+#build linux amd64 linux64 server
+#build linux 386 linux32 server
+#build windows amd64 win64 server
+#build windows 386 win32 server
+