Hacs doc (#49)

Hacs integration

README.md

@@ -4,7 +4,9 @@
 
 Ideas are welcome ! Don't hesitate to create issue to suggest something, it will be really appreciated.
 
-Please download the `multimatic` folder and put it inside your `custom_components` folder.
+##Installations
+- If you are using HACS, please see https://hacs.xyz/docs/faq/custom_repositories/
+- Otherwise, download the zip from the latest release and copy `multimatic` folder and put it inside your `custom_components` folder.
 
 You can configure it through the UI using integration.
 You have to provided your username and password (same as multimatic app)
@@ -97,6 +99,8 @@ and past it to `custom_component`
 6) The hard job is starting now, you have to find old entity_id you were using in automation or somewhere else. 
 You can do some find and replace (e.g. `climate.vaillant_bathroom`-> `climate.bathroom`)
 
+### [1.6.0](https://github.com/thomasgermain/vaillant-component/releases/tag/1.6.0)
+- Supporting HACS (only by custom repository right now). Please be sure to install at least version 1.6.0). See https://hacs.xyz/docs/faq/custom_repositories/ for installations.
 
 ## Provided entities
 - 1 water_heater entity, if any water heater: `water_heater.<water heater id>`, basically `water_heater.control_dhw`