add Watchlist candidates

src/client.js

@@ -20,6 +20,7 @@ function ClearbitClient (config) {
   this.Person = require('./person').Person(this);
   this.PersonCompany = require('./person').PersonCompany(this);
   this.Watchlist = require('./watchlist').Watchlist(this);
+  this.WatchlistCandidate = require('./watchlist').WatchlistCandidate(this);
   this.WatchlistEntity = require('./watchlist').WatchlistEntity(this);
   this.WatchlistIndividual = require('./watchlist').WatchlistIndividual(this);
 }

src/resource.js

@@ -40,6 +40,20 @@ ClearbitResource.post = function (path, options) {
     });
 };
 
+ClearbitResource.del = function (path, options) {
+  options = _.extend({
+    path:   path,
+    method: 'delete'
+  }, this.options, options);
+
+  return this.client.request(options)
+    .bind(this)
+    .then(cast)
+    .catch(isUnknownRecord, function () {
+      throw new this.NotFoundError(this.name + ' not found');
+    });
+};
+
 exports.create = function (name, options) {
   var Resource = function () {
     ClearbitResource.apply(this, arguments);

src/watchlist.js

@@ -28,3 +28,23 @@ exports.WatchlistEntity = resource.create('WatchlistEntity', {
     return this.post('/search/entities', options);
   }
 });
+
+exports.WatchlistCandidate = resource.create('WatchlistCandidate', {
+  api: 'watchlist'
+}).extend({
+  destroy: function(){
+    return this.constructor.del('/candidates/' + this.id);
+  }
+}, {
+  all: function(options) {
+    return this.get('/candidates', options);
+  },
+
+  create: function(options) {
+    return this.post('/candidates', options);
+  },
+
+  find: function(id, options) {
+    return this.get('/candidates/' + id, options);
+  }
+});