Add support proxy

index.js

@@ -12,14 +12,16 @@ var slice = Array.prototype.slice;
  * @param {String} api The API key for the Full Contact service.
  * @api public
  */
-function FullContact(api) {
+function FullContact(api, proxy) {
   if (!(this instanceof FullContact)) {
-    return new FullContact(api);
+    return new FullContact(api, proxy);
   }
 
   this.key = api;         // API key
   this.version = 'v2';    // API version
 
+  this.proxy = proxy || null;
+
   this.remaining = 0;     // How many API calls are remaining
   this.ratelimit = 0;     // The amount of API calls allowed
   this.ratereset = 0;     // In how many seconds is the rate limit reset
@@ -211,7 +213,8 @@ FullContact.prototype.exec = function exec(fn) {
       requests: requests.map(function urlsonly(data) {
         return data.url;
       })
-    }
+    },
+    proxy: this.proxy
   }, function requested(err, res, body) {
     if (err) {
       return bailout(err);