Provide method for deleting a remote

Fixes #418

pygit2/decl.h

@@ -129,6 +129,7 @@ int git_remote_create(
 	git_repository *repo,
 	const char *name,
 	const char *url);
+int git_remote_delete(git_remote *remote);
 int git_repository_state_cleanup(git_repository *repo);
 
 const char * git_remote_name(const git_remote *remote);

pygit2/remote.py

@@ -177,6 +177,14 @@ class Remote(object):
         err = C.git_remote_set_pushurl(self._remote, to_bytes(value))
         check_error(err)
 
+    def delete(self):
+        """Remove this remote
+
+        All remote-tracking branches and configuration settings for the remote will be removed.
+        """
+        err = C.git_remote_delete(self._remote)
+        check_error(err)
+
     def save(self):
         """save()
 

test/test_remote.py

@@ -62,6 +62,17 @@ class RepositoryTest(utils.RepoTestCase):
 
         self.assertRaises(ValueError, self.repo.create_remote, *(name, url))
 
+    def test_remote_delete(self):
+        name = 'upstream'
+        url = 'git://github.com/libgit2/pygit2.git'
+
+        self.repo.create_remote(name, url)
+        self.assertEqual(2, len(self.repo.remotes))
+        remote = self.repo.remotes[1]
+
+        self.assertEqual(name, remote.name)
+        remote.delete()
+        self.assertEqual(1, len(self.repo.remotes))
 
     def test_remote_rename(self):
         remote = self.repo.remotes[0]