Implement addVotes

@@ -82,7 +82,14 @@
             candidate.votes.push(i);
         }
     };
-    RelativePlacement.prototype.addVotes = function () {};
+
+    /**
+     *
+     * @param {String[][]} votes
+     */
+    RelativePlacement.prototype.addVotes = function (votes) {
+        votes.forEach(vote => this.addVote(vote));
+    };
     RelativePlacement.prototype.getResult = function () {
         return relativePlacement(this.votes, this.candidateList);
     };