To merge json gem to ruby repo

merge-json.sh

#!/bin/sh
# you should merge https://github.com/nurse/json/tree/fix-extconf before merging
dest=$1
cp -R lib/* $dest/ext/json/lib
cp -R ext/json/ext/* $dest/ext/json
cp -R tests/* $dest/test/json
cd $dest/ext/json/lib/json/
rm -rf *.xpm pure* ext editor.rb add/rails.rb

• cdしてからrmすれば{}不要
• 決め打ちのフルパスが散らばってるのはうれしくない