updated README for branch hooks

Author: bdbch

README.md

@@ -22,15 +22,7 @@ import { useRepos } from "@d2k/react-github";
 function MyComponent() {
   const { repos, loading, error } = useRepos("nat");
 
-  return (
-    <div>
-      {loading && <div>Loading repositories</div>}
-      {error && <div>{err}</div>}
-      {repos &&
-        repos.length > 0 &&
-        repos.map(repo => <div key={repo.id}>{repo.name}</div>)}
-    </div>
-  );
+  // your component
 }
 ```
 
@@ -42,17 +34,30 @@ import { useUser } from "@d2k/react-github";
 function MyComponent() {
   const { user, loading, error } = useUser("nat");
 
-  return (
-    <div>
-      {loading && <div>Loading repositories</div>}
-      {error && <div>{err}</div>}
-      {user && (
-        <div>
-          <h1>{user.login}</h1>
-          <img src={user.avatar_url} />
-        </div>
-      )}
-    </div>
-  );
+  // your component
+}
+```
+
+### Get branches from repo
+
+```js
+import { useBranches } from "@d2k/react-github";
+
+function MyComponent() {
+  const { branches, loading, error } = useBranches("facebook", "react");
+
+  // your component
+}
+```
+
+### Get branch from repo
+
+```js
+import { useBranch } from "@d2k/react-github";
+
+function MyComponent() {
+  const { branch, loading, error } = useBranch("facebook", "react", "master");
+
+  // your component
 }
 ```