Add example to README.md

Author: python273

README.md

@@ -6,6 +6,17 @@ vk_api [![PyPI](https://img.shields.io/pypi/v/vk_api.svg)](https://pypi.python.o
 * [Примеры использования](./examples) (python3)
 * [Документация по методам API](https://vk.com/dev/methods)
 
+```python
+import vk_api
+
+vk_session = vk_api.VkApi('+71234567890', 'mypassword')
+vk_session.auth()
+
+vk = vk_session.get_api()
+
+print(vk.wall.post(message='Hello world!'))
+```
+
 Установка
 ------------
     $ pip install vk_api