Update for new http-proxy API
Update for new http-proxy API

node.couchapp.js had an asterisks in its package.json for http-proxy,
which updated it’s API about 10 days ago. New installs of
node.couchapp.js break as a result. This patch updates bin.js to the
new API.

mikeal/node.couchapp.js,mikeal/node.couchapp.js