MW 1.22 and SMW 1.9beta install/upgrade

From semantic-mediawiki.org

I completely messed up things with MW 1.21.x and the "ExtensionInstaller" extension. Apparently or luckily this approach works as expected, too. This should also work for MW 1.19.x and 1.20.x

17:26, 13 December 2013

I need to remember documenting this too

15:34, 18 December 2013