doc: added 'SettingTitle' to __all__
doc: added 'SettingTitle' to __all__

This class was mentioned in the Docs but the link was broken due to it's ommission for __all__.

VinGarcia/kivy,kived/kivy,matham/kivy,jkankiewicz/kivy,aron-bordin/kivy,bob-the-hamster/kivy,MiyamotoAkira/kivy,jegger/kivy,Ramalus/kivy,manashmndl/kivy,rafalo1333/kivy,iamutkarshtiwari/kivy,bob-the-hamster/kivy,manthansharma/kivy,LogicalDash/kivy,angryrancor/kivy,rafalo1333/kivy,vitorio/kivy,arcticshores/kivy,thezawad/kivy,Ramalus/kivy,bionoid/kivy,edubrunaldi/kivy,Farkal/kivy,janssen/kivy,habibmasuro/kivy,rafalo1333/kivy,edubrunaldi/kivy,yoelk/kivy,vipulroxx/kivy,yoelk/kivy,arlowhite/kivy,LogicalDash/kivy,andnovar/kivy,ernstp/kivy,denys-duchier/kivy,iamutkarshtiwari/kivy,jkankiewicz/kivy,manashmndl/kivy,denys-duchier/kivy,arcticshores/kivy,janssen/kivy,jffernandez/kivy,manthansharma/kivy,CuriousLearner/kivy,jffernandez/kivy,viralpandey/kivy,dirkjot/kivy,arcticshores/kivy,cbenhagen/kivy,kived/kivy,edubrunaldi/kivy,yoelk/kivy,VinGarcia/kivy,Cheaterman/kivy,gonzafirewall/kivy,denys-duchier/kivy,jkankiewicz/kivy,iamutkarshtiwari/kivy,yoelk/kivy,jffernandez/kivy,ernstp/kivy,JohnHowland/kivy,KeyWeeUsr/kivy,darkopevec/kivy,kivy/kivy,vipulroxx/kivy,gonzafirewall/kivy,kived/kivy,vipulroxx/kivy,gonzafirewall/kivy,angryrancor/kivy,matham/kivy,jehutting/kivy,el-ethan/kivy,xpndlabs/kivy,andnovar/kivy,youprofit/kivy,MiyamotoAkira/kivy,matham/kivy,LogicalDash/kivy,habibmasuro/kivy,KeyWeeUsr/kivy,mSenyor/kivy,jkankiewicz/kivy,viralpandey/kivy,adamkh/kivy,ernstp/kivy,bliz937/kivy,xpndlabs/kivy,adamkh/kivy,KeyWeeUsr/kivy,bliz937/kivy,bionoid/kivy,LogicalDash/kivy,el-ethan/kivy,Farkal/kivy,mSenyor/kivy,autosportlabs/kivy,inclement/kivy,tony/kivy,janssen/kivy,matham/kivy,cbenhagen/kivy,andnovar/kivy,vipulroxx/kivy,adamkh/kivy,xiaoyanit/kivy,angryrancor/kivy,Cheaterman/kivy,arcticshores/kivy,inclement/kivy,autosportlabs/kivy,jehutting/kivy,Shyam10/kivy,thezawad/kivy,aron-bordin/kivy,darkopevec/kivy,angryrancor/kivy,janssen/kivy,darkopevec/kivy,ernstp/kivy,MiyamotoAkira/kivy,bionoid/kivy,bob-the-hamster/kivy,rnixx/kivy,akshayaurora/kivy,denys-duchier/kivy,adamkh/kivy,gonzafirewall/kivy,vitorio/kivy,kivy/kivy,Cheaterman/kivy,jegger/kivy,akshayaurora/kivy,thezawad/kivy,kivy/kivy,manthansharma/kivy,youprofit/kivy,habibmasuro/kivy,xiaoyanit/kivy,VinGarcia/kivy,JohnHowland/kivy,xiaoyanit/kivy,aron-bordin/kivy,viralpandey/kivy,MiyamotoAkira/kivy,KeyWeeUsr/kivy,bhargav2408/kivy,cbenhagen/kivy,CuriousLearner/kivy,arlowhite/kivy,autosportlabs/kivy,jffernandez/kivy,Farkal/kivy,bob-the-hamster/kivy,dirkjot/kivy,Shyam10/kivy,Cheaterman/kivy,JohnHowland/kivy,mSenyor/kivy,dirkjot/kivy,arlowhite/kivy,dirkjot/kivy,youprofit/kivy,bionoid/kivy,rnixx/kivy,JohnHowland/kivy,akshayaurora/kivy,jegger/kivy,vitorio/kivy,Shyam10/kivy,CuriousLearner/kivy,manthansharma/kivy,bhargav2408/kivy,jehutting/kivy,xpndlabs/kivy,bhargav2408/kivy,rnixx/kivy,manashmndl/kivy,Shyam10/kivy,tony/kivy,jegger/kivy,aron-bordin/kivy,Farkal/kivy,darkopevec/kivy,Ramalus/kivy,el-ethan/kivy,bliz937/kivy,inclement/kivy,tony/kivy