close curl before process.on 'exit'

examples/test.js

@@ -42,6 +42,7 @@
       return stream.on('end', function() {
         var _this = this;
         p("----");
+        curl.close();
         p("deleting " + cookieFile);
         return fs.unlink(cookieFile, function() {
           return p("done.");

examples/test.toffee

@@ -25,6 +25,7 @@ stream = fs.createReadStream(cookieFile)
 stream.pipe(process.stdout)
 stream.on 'end', ->
   p "----"
+  curl.close()
   p "deleting #{cookieFile}"
   fs.unlink! cookieFile
   p "done."