Update archlinux.rst as packages have changed

The docker package has been added into the Arch Linux community repo, this means that the package names and installation instructions have slightly changed.

docs/sources/installation/archlinux.rst

@@ -12,21 +12,22 @@ Arch Linux
 .. include:: install_unofficial.inc
 
 Installing on Arch Linux is not officially supported but can be handled via 
-one of the following AUR packages:
+the package in community:
 
-* `lxc-docker <https://aur.archlinux.org/packages/lxc-docker/>`_
-* `lxc-docker-git <https://aur.archlinux.org/packages/lxc-docker-git/>`_
-* `lxc-docker-nightly <https://aur.archlinux.org/packages/lxc-docker-nightly/>`_
+* `docker <https://www.archlinux.org/packages/community/x86_64/docker/>`_
 
-The lxc-docker package will install the latest tagged version of docker. 
-The lxc-docker-git package will build from the current master branch.
-The lxc-docker-nightly package will install the latest build.
+or the following AUR package:
+
+* `docker-git <https://aur.archlinux.org/packages/docker-git/>`_
+
+The docker package will install the latest tagged version of docker. 
+The docker-git package will build from the current master branch.
 
 Dependencies
 ------------
 
 Docker depends on several packages which are specified as dependencies in
-the AUR packages. The core dependencies are:
+the packages. The core dependencies are:
 
 * bridge-utils
 * device-mapper
@@ -37,15 +38,23 @@ the AUR packages. The core dependencies are:
 Installation
 ------------
 
+For the normal package a simple
+::
+
+    pacman -S docker
+    
+is all that is needed.
+
+For the AUR package execute:
+::
+
+    yaourt -S lxc-docker-git
+    
 The instructions here assume **yaourt** is installed.  See 
 `Arch User Repository <https://wiki.archlinux.org/index.php/Arch_User_Repository#Installing_packages>`_
 for information on building and installing packages from the AUR if you have not
 done so before.
 
-::
-
-    yaourt -S lxc-docker
-
 
 Starting Docker
 ---------------