Mention the available dash docset version of the documentation (#76)

* mention the docset

* accepted as part of the official user-contribs

README.md

@@ -35,6 +35,7 @@ supports [partial application][currying], so the parameter order is:
 ## API and Examples
 
 ### Full example
+
 ```js
 var u = require('updeep');
 
@@ -174,6 +175,7 @@ expect(result).to.eql({ todos: [{ done: false }, { done: false }, { done: false
 ```
 
 #### When null or undefined object, updeep uses a default object
+
 ```javascript
 var result = u({ foo: 'bar' }, null);
 expect(result).to.eql({ foo: 'bar' });
@@ -525,6 +527,7 @@ case.
     ```bash
     $ npm version major|minor|patch
     ```
+
 1. Update the `CHANGELOG.md`.
   1. Add the new version and corresponding notes.
   1. Add a link to the new version.
@@ -536,10 +539,21 @@ case.
 $ git push origin master --follow-tags
 ```
 
+## See Also
+
+A [Dash][dash] version of the documention is also available
+as part of their user-contributed docsets.
+For [Zeal][zeal] users, the user-contributed docsets
+can be accessed via [zealusercontributions.herokuapp.com][zealuc].
+
 ## License
 
 MIT ©2015 [Substantial](http://substantial.com)
 
+[zealuc]: http://zealusercontributions.herokuapp.com/
+[dash]: https://kapeli.com/dash
+[zeal]: https://zealdocs.org/
+[docset]: https://github.com/yanick/dash-docset-updeep
 [npm-image]: https://badge.fury.io/js/updeep.svg
 [npm-url]: https://npmjs.org/package/updeep
 [travis-image]: https://travis-ci.org/substantial/updeep.svg?branch=master