wikicorpus: Refactor MediaWiki IGNORED_NAMESPACES
wikicorpus: Refactor MediaWiki IGNORED_NAMESPACES

* Refactor ignore_namespaces that previously used just a split over a
  line of text into a list.

* Add a few more namespaces into the IGNORED_NAMESPACES list.

Signed-off-by: mr.Shu <8e7be411ad89ade93d144531f3925d0bb4011004@shu.io>

pombredanne/gensim,loisaidasam/gensim,quole/gensim,robotcator/gensim,bhargavvader/gensim,gojomo/gensim,markroxor/gensim,zachmayer/gensim,tzoiker/gensim,pombredanne/gensim,ELind77/gensim,bhargavvader/gensim,bhargavvader/gensim,olavurmortensen/gensim,tzoiker/gensim,RaRe-Technologies/gensim,dsquareindia/gensim,tzoiker/gensim,akutuzov/gensim,davechallis/gensim,akutuzov/gensim,gojomo/gensim,isohyt/gensim,laic/gensim,isohyt/gensim,pombredanne/gensim,olavurmortensen/gensim,loisaidasam/gensim,gojomo/gensim,ziky90/gensim,davechallis/gensim,zachmayer/gensim,isohyt/gensim,piskvorky/gensim,ziky90/gensim,dsquareindia/gensim,olavurmortensen/gensim,summanlp/gensim,RaRe-Technologies/gensim,mattilyra/gensim,laic/gensim,Kreiswolke/gensim,akutuzov/gensim,Kreiswolke/gensim,markroxor/gensim,gojomo/gensim,jaksmid/gensim,jaksmid/gensim,davechallis/gensim,ELind77/gensim,macks22/gensim,laic/gensim,mattilyra/gensim,robotcator/gensim,jaksmid/gensim,markroxor/gensim,piskvorky/gensim,ziky90/gensim,loisaidasam/gensim,quole/gensim,summanlp/gensim,zachmayer/gensim,macks22/gensim,ELind77/gensim,quole/gensim,piskvorky/gensim,macks22/gensim,Kreiswolke/gensim,dsquareindia/gensim,mattilyra/gensim,summanlp/gensim,RaRe-Technologies/gensim,robotcator/gensim,RaRe-Technologies/gensim