Add ESPHome native API docs (#7873)

* Add esphomelib native API docs

* ✨ Rename to ESPHome

* Address comments

* Update esphome.markdown

source/_components/esphome.markdown

@@ -0,0 +1,27 @@
+---
+layout: page
+title: "ESPHome"
+description: "Support for ESPHome devices using the native ESPHome API."
+date: 2018-12-16 14:20
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: esphome.png
+ha_category: DIY
+ha_release: 0.85
+ha_iot_class: "Local Push"
+---
+
+This component allows you to connect your [ESPHome](https://esphomelib.com/esphomeyaml/index.html) devices directly into Home Assistant with the [native ESPHome API](https://esphomelib.com/esphomeyaml/components/api.html).
+
+## {% linkable_title Setup the component via the integrations screen %}
+
+Menu: *Configuration* -> *Integrations*
+
+Press on **ESPHome** and configure the integration:
+
+* Enter the address and port of your ESP. For example if the node is called `livingroom`, the address would be `livingroom.local` and the port number `6053` (default).
+* Then Home Assistant will try to connect to the device. If you have a password set Home Assistant will additionally ask you for the password.
+
+After that, all the entities you have configured on your ESPHome node will automatically show up in Home Assistant.