Added handling for #subobject in Page Schemas, plus some small fixes

Change-Id: I79cf7f6be8df81ceac5aead8a8691918f8805b3d
Localisation updates from http://translatewiki.net.

Change-Id: Idbf341354ef78d028d1a01727c34bfcde7ea9878
Merge branch 'master' of ssh://review/mediawiki/extensions/SemanticMediaWiki