Telegram Bot enhancements with callback queries and new notification services (#7454)

* telegram_bot and notify.telegram enhancements:
- Receive callback queries and produce `telegram_callback` events.
- Custom reply_markup (keyboard or inline_keyboard) for every type of message (message, photo, location & document).
- `disable_notification`, `disable_web_page_preview`, `reply_to_message_id` and `parse_mode` optional keyword args.
- Line break between title and message fields: `'{}\n{}'.format(title, message)`
- Move Telegram notification services to `telegram_bot` component and forward service calls from the telegram notify service to the telegram component, so now the `notify.telegram` platform depends of `telegram_bot`, and there is no need for `api_key` in the notifier configuration. The notifier calls the new notification services of the bot component:
	- telegram_bot/send_message
	- telegram_bot/send_photo
	- telegram_bot/send_document
	- telegram_bot/send_location
	- telegram_bot/edit_message
	- telegram_bot/edit_caption
	- telegram_bot/edit_replymarkup
	- telegram_bot/answer_callback_query
- Added descriptions of the new notification services with a services.yaml file.
- CONFIG_SCHEMA instead of PLATFORM_SCHEMA for the `telegram_bot` component, so only one platform is allowed.
- Async component setup.

* telegram_bot and notify.telegram enhancements: change in requirements_all.txt.

homeassistant/components/telegram_bot/polling.py

@@ -11,19 +11,15 @@ import logging
 import async_timeout
 from aiohttp.client_exceptions import ClientError
 
-from homeassistant.components.telegram_bot import CONF_ALLOWED_CHAT_IDS, \
-    BaseTelegramBotEntity, PLATFORM_SCHEMA
-from homeassistant.const import EVENT_HOMEASSISTANT_START, \
-    EVENT_HOMEASSISTANT_STOP, CONF_API_KEY
+from homeassistant.components.telegram_bot import (
+    CONF_ALLOWED_CHAT_IDS, BaseTelegramBotEntity)
+from homeassistant.const import (
+    EVENT_HOMEASSISTANT_START, EVENT_HOMEASSISTANT_STOP, CONF_API_KEY)
 from homeassistant.core import callback
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 _LOGGER = logging.getLogger(__name__)
 
-REQUIREMENTS = ['python-telegram-bot==5.3.1']
-
-PLATFORM_SCHEMA = PLATFORM_SCHEMA
-
 
 @asyncio.coroutine
 def async_setup_platform(hass, config, async_add_devices, discovery_info=None):