Add typename qualifiers to Singleton.h
Add typename qualifiers to Singleton.h

Summary: MSVC complains if these are not there.
Closes #248

Reviewed By: @yfeldblum

Differential Revision: D2282845

Pulled By: @sgolemon

facebook/folly,bowlofstew/folly,loversInJapan/folly,chjp2046/folly,constantine001/folly,theiver9827/folly,CJstar/folly,mqeizi/folly,tomhughes/folly,xzmagic/folly,reddit/folly,rklabs/folly,leolujuyi/folly,bobegir/folly,loversInJapan/folly,theiver9827/folly,raphaelamorim/folly,yangjin-unique/folly,shaobz/folly,Eagle-X/folly,KSreeHarsha/folly,chjp2046/folly,renyinew/folly,charsyam/folly,PPC64/folly,upsoft/folly,gaoyingie/folly,charsyam/folly,theiver9827/folly,hongliangzhao/folly,juniway/folly,loversInJapan/folly,upsoft/folly,juniway/folly,wildinto/folly,floxard/folly,bikong2/folly,SeanRBurton/folly,KSreeHarsha/folly,CJstar/folly,Hincoin/folly,sonnyhu/folly,bikong2/folly,hongliangzhao/folly,Orvid/folly,clearlylin/folly,Eagle-X/folly,gavioto/folly,gaoyingie/folly,bowlofstew/folly,tempbottle/folly,tomhughes/folly,SammyK/folly,lifei/folly,doctaweeks/folly,reddit/folly,Hincoin/folly,sonnyhu/folly,Eagle-X/folly,brunomorishita/folly,Eagle-X/folly,alexst07/folly,stonegithubs/folly,PPC64/folly,PoisonBOx/folly,facebook/folly,Hincoin/folly,mqeizi/folly,rklabs/folly,rklabs/folly,raphaelamorim/folly,shaobz/folly,juniway/folly,tomhughes/folly,wildinto/folly,stonegithubs/folly,yangjin-unique/folly,chjp2046/folly,stonegithubs/folly,doctaweeks/folly,charsyam/folly,wildinto/folly,brunomorishita/folly,tomhughes/folly,constantine001/folly,stonegithubs/folly,fw1121/folly,brunomorishita/folly,Hincoin/folly,raphaelamorim/folly,guker/folly,Orvid/folly,raphaelamorim/folly,sonnyhu/folly,SammyK/folly,xzmagic/folly,juniway/folly,loversInJapan/folly,sonnyhu/folly,bowlofstew/folly,PoisonBOx/folly,floxard/folly,SammyK/folly,bobegir/folly,SammyK/folly,xzmagic/folly,guker/folly,tempbottle/folly,zhiweicai/folly,Eagle-X/folly,arg0/folly,mqeizi/folly,sonnyhu/folly,stonegithubs/folly,bikong2/folly,facebook/folly,hongliangzhao/folly,yangjin-unique/folly,clearlylin/folly,Hincoin/folly,shaobz/folly,CJstar/folly,clearlylin/folly,leolujuyi/folly,alexst07/folly,theiver9827/folly,Orvid/folly,gavioto/folly,brunomorishita/folly,clearlylin/folly,mqeizi/folly,lifei/folly,facebook/folly,guker/folly,doctaweeks/folly,hongliangzhao/folly,guker/folly,bikong2/folly,arg0/folly,loversInJapan/folly,lifei/folly,bowlofstew/folly,wildinto/folly,renyinew/folly,tempbottle/folly,gavioto/folly,SammyK/folly,arg0/folly,SeanRBurton/folly,gavioto/folly,upsoft/folly,doctaweeks/folly,zhiweicai/folly,renyinew/folly,zhiweicai/folly,gavioto/folly,tempbottle/folly,tomhughes/folly,gaoyingie/folly,facebook/folly,Orvid/folly,fw1121/folly,reddit/folly,leolujuyi/folly,SeanRBurton/folly,sakishum/folly,guker/folly,shaobz/folly,lifei/folly,PoisonBOx/folly,charsyam/folly,sakishum/folly,xzmagic/folly,alexst07/folly,SeanRBurton/folly,fw1121/folly,alexst07/folly,upsoft/folly,fw1121/folly,theiver9827/folly,constantine001/folly,brunomorishita/folly,Orvid/folly,arg0/folly,bobegir/folly,upsoft/folly,zhiweicai/folly,bobegir/folly,PPC64/folly,doctaweeks/folly,KSreeHarsha/folly,hongliangzhao/folly,PoisonBOx/folly,lifei/folly,zhiweicai/folly,reddit/folly,bikong2/folly,yangjin-unique/folly,xzmagic/folly,floxard/folly,SeanRBurton/folly,clearlylin/folly,KSreeHarsha/folly,sakishum/folly,chjp2046/folly,floxard/folly,bobegir/folly,leolujuyi/folly,mqeizi/folly,rklabs/folly,wildinto/folly,yangjin-unique/folly,constantine001/folly,juniway/folly,renyinew/folly,alexst07/folly,renyinew/folly,chjp2046/folly,sakishum/folly,rklabs/folly,fw1121/folly,gaoyingie/folly,tempbottle/folly,sakishum/folly,arg0/folly,leolujuyi/folly,floxard/folly,bowlofstew/folly,constantine001/folly,gaoyingie/folly,PPC64/folly,shaobz/folly,CJstar/folly,PPC64/folly,raphaelamorim/folly,PoisonBOx/folly,KSreeHarsha/folly,reddit/folly,CJstar/folly