Refactoring and write doc's for Bot class. Split bot to 2 classes

docs/source/quick_start.rst

@@ -1,3 +1,65 @@
 Quick start
 ===========
 
+Simple template
+---------------
+
+.. code-block:: python3
+
+    import asyncio
+    from aiogram import Bot
+
+
+    loop = asyncio.get_event_loop()
+    bot = Bot('TOKEN', loop)
+
+
+    async def main():
+        bot_info = await bot.get_me()
+
+        print(bot_info.username)
+
+
+    if __name__ == '__main__':
+        try:
+            loop.run_until_complete(main())
+        except KeyboardInterrupt:
+            loop.stop()
+
+
+Manual
+------
+
+First you need to get event loop from asyncio
+
+.. code-block:: python3
+
+    import asyncio
+
+    loop = asyncio.get_event_loop()
+
+Then create bot instance, if you have bot token.
+
+Token you can get from `@BotFather <https://t.me/BotFather>`_
+
+.. code-block:: python3
+
+    from aiogram import Bot
+
+    bot = Bot('TOKEN', loop)
+
+
+And then you can use Dispather module:
+
+.. code-block:: python3
+
+    from aiogram.dispather import Dispatcher
+
+    dp = Dispatcher(bot)
+
+Dispatcher cah handler updates from telegram bot API.
+
+It have **dp.start_pooling()** method.
+
+
+