updated install procedures for arch (home-assistant#2513)

tylershaw · fabaff · commit 3d0ef70f0dde · 2017-04-26T22:22:36.000+02:00
changed pacman for pacaur (pacman doesn't directly install things from the AUR, pacaur or cower do).
diff --git a/source/_docs/installation/archlinux.markdown b/source/_docs/installation/archlinux.markdown
@@ -24,8 +24,8 @@ and Home Assistant itself.
 $ pip3 install homeassistant
 ```
 
-Home Assistant is part of the [AUR](https://aur.archlinux.org/packages/home-assistant/). This means that it can be installed directly with `pacman`:
+Home Assistant is part of the [AUR](https://aur.archlinux.org/packages/home-assistant/). This means that it can be installed  with `pacaur`:
 
 ```bash
-$ sudo pacman -S home-assistant
+$ sudo pacaur -S home-assistant
 ```
