Add @variation support

lib/parse.js

@@ -162,7 +162,9 @@ var flatteners = {
   // 'type'
   'typedef': flattenTypedName,
   'var': synonym('member'),
-  // 'variation'
+  'variation': function (result, tag) {
+    result.variation = tag.variation;
+  },
   'version': flattenDescription,
   'virtual': synonym('abstract')
 };

test/lib/parse.js

@@ -499,6 +499,14 @@ test('parse - @var', function (t) {
   t.end();
 });
 
+test('parse - @variation', function (t) {
+  t.equal(evaluate(function () {
+    /** @variation 1 */
+  })[0].variation, 1, 'see');
+
+  t.end();
+});
+
 test('parse - @version', function (t) {
   t.end();
 });