Updated mediawiki/skins
Project: mediawiki/skins/BlueSky  a25897cfcf469450dbd1f19d3de08e6d90ca20a3

Separated the main page specific CSS from the base module and moved it to
a separate module which is loaded only on the main page.

Change-Id: I7c3c29cb5dca6adfb1ac69de4c8510087df8448a