Add full articles to preprocessor tests.
* QuoteQuran.txt is GFDL/CC-BY-SA, created by [[en:User:Striver]] at http://en.wikipedia.org/w/index.php?title=Template:QuoteQuran/sandbox&oldid=
237348988
* Factorial.txt is GFDL + CC-BY-SA, created by [[en:User:Polonium]] at http://en.wikipedia.org/w/index.php?title=Template:Factorial&oldid=
98548758
* All_system_messages.txt was generated by MediaWiki, so already GPL. Copied from http://tl.wiktionary.org/w/index.php?title=Suleras:All_system_messages&oldid=2765
Added along their preprocessed xml.