Update copyright years

Signed-off-by: Prayag Verma <prayag.verma@gmail.com>

Gruntfile.js

@@ -91,7 +91,7 @@ module.exports = function (grunt) {
             'FileDescription': WINDOWS_APPNAME,
             'InternalName': BASENAME + '.exe',
             'OriginalFilename': BASENAME + '.exe',
-            'LegalCopyright': 'Copyright 2015 Docker Inc. All rights reserved.'
+            'LegalCopyright': 'Copyright 2015-2016 Docker Inc. All rights reserved.'
           }
         }
       }

LICENSE

@@ -187,7 +187,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2014-2015 Docker, Inc.
+   Copyright 2014-2016 Docker, Inc.
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.