Added unstar() method

Author: AurelioDeRosa

README.md

@@ -250,6 +250,12 @@ Star a repository.
 repo.star(owner, repository, function(err) {});
 ```
 
+Unstar a repository.
+
+```js
+repo.unstar(owner, repository, function(err) {});
+```
+
 ## User API
 
 

src/github.js

@@ -859,6 +859,13 @@
          this.star = function(owner, repository, cb) {
             _request('PUT', '/user/starred/' + owner + '/' + repository, null, cb)
          };
+
+         // Unstar a repository.
+         // --------
+
+         this.unstar = function(owner, repository, cb) {
+            _request('DELETE', '/user/starred/' + owner + '/' + repository, null, cb)
+         };
       };
 
       // Gists API

test/test.repo.js

@@ -37,7 +37,7 @@ if (typeof window === 'undefined') { // We're in NodeJS
    }
 }
 
-describe.only('Github.Repository', function() {
+describe('Github.Repository', function() {
    before(function() {
       github = new Github({
          username: testUser.USERNAME,
@@ -516,6 +516,17 @@ describe('Creating new Github.Repository', function() {
          });
       });
    });
+
+   it('should unstar the repo', function(done) {
+      repo.unstar(testUser.USERNAME, repoTest, function(err) {
+         should.not.exist(err);
+
+         repo.isStarred(testUser.USERNAME, repoTest, function(err) {
+            err.error.should.equal(404);
+            done();
+         });
+      });
+   });
 });
 
 describe('deleting a Github.Repository', function() {