Add remove method

lib/advanced_structures/SocialGraph.js

@@ -123,6 +123,40 @@ SocialGraph.prototype.getFollowers = function (callback) {
     return this;
 }
 
+/**
+* Remove user followers and following.
+* @param {Function} callback (optional)
+* @return this
+* @api public
+*/
+SocialGraph.prototype.remove = function (callback) {
+
+    this.getFollowers(function(err, followers_list) {
+        if(followers_list === undefined || followers_list == undefined) {
+                followers_list = [];
+            }
+            if(followers_list.length > 0) {
+                // remove permissions from users set.
+                followers_list.forEach(function (follower) {
+                    var social_graph = createSocialGraph(follower);
+                    social_graph.unfollow(following_list, function(err, value) {});
+                });
+            }
+    })
+
+    this.getFollowing(function(err, following_list) {
+        if(following_list === undefined || following_list == undefined) {
+            following_list = [];
+        }
+        if(following_list.length > 0) {
+            this.unfollow(following_list, function(err, value) {});
+        }
+    });
+
+    // TODO: Need to change this code so followers and following list are removed in the same transaction.
+    return callback(null, ""); 
+}
+
 /**
  * Count how many users the current user follows.
  *