Relicense as Apache-2.0.

LICENSE

+Copyright 2013 CyberAgent, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

README.md

@@ -600,7 +600,7 @@ We use [debug][node-debug], and our debug namespace is `adb`. Some of the depend
 
 ## License
 
-Restricted until further notice.
+See [LICENSE](LICENSE).
 
 [nodejs]: <http://nodejs.org/>
 [coffeescript]: <http://coffeescript.org/>

package.json

@@ -33,7 +33,7 @@
     "sinon": "~1.7.3",
     "sinon-chai": "~2.4.0"
   },
-  "license": "restricted",
+  "license": "Apache-2.0",
   "engines": {
     "node": ">= 0.10.4"
   }