Clarify contribution policy
Clarify contribution policy

slayerlp/zxing,sunil1989/zxing,ChristingKim/zxing,roudunyy/zxing,MonkeyZZZZ/Zxing,ren545457803/zxing,hiagodotme/zxing,kailIII/zxing,befairyliu/zxing,BraveAction/zxing,zilaiyedaren/zxing,ouyangkongtong/zxing,wirthandrel/zxing,huangsongyan/zxing,Luise-li/zxing,mecury/zxing,sysujzh/zxing,DONIKAN/zxing,whycode/zxing,layeka/zxing,tks-dp/zxing,geeklain/zxing,ctoliver/zxing,lvbaosong/zxing,1shawn/zxing,l-dobrev/zxing,rustemferreira/zxing-projectx,DONIKAN/zxing,daverix/zxing,irfanah/zxing,zxing/zxing,kyosho81/zxing,Fedhaier/zxing,Fedhaier/zxing,917386389/zxing,Akylas/zxing,loaf/zxing,layeka/zxing,allenmo/zxing,whycode/zxing,projectocolibri/zxing,DavidLDawes/zxing,zxing/zxing,mayfourth/zxing,irwinai/zxing,YuYongzhi/zxing,freakynit/zxing,wangjun/zxing,huangzl233/zxing,Akylas/zxing,ale13jo/zxing,praveen062/zxing,easycold/zxing,jianwoo/zxing,krishnanMurali/zxing,ikenneth/zxing,mig1098/zxing,huihui4045/zxing,mecury/zxing,Solvoj/zxing,ChristingKim/zxing,zzhui1988/zxing,hgl888/zxing,TestSmirk/zxing,sitexa/zxing,gank0326/zxing,kharohiy/zxing,Akylas/zxing,projectocolibri/zxing,sysujzh/zxing,praveen062/zxing,wangxd1213/zxing,917386389/zxing,wanjingyan001/zxing,irwinai/zxing,daverix/zxing,tks-dp/zxing,daverix/zxing,huangsongyan/zxing,shwethamallya89/zxing,Yi-Kun/zxing,kharohiy/zxing,JerryChin/zxing,GeekHades/zxing,roadrunner1987/zxing,east119/zxing,todotobe1/zxing,OnecloudVideo/zxing,fhchina/zxing,ForeverLucky/zxing,roadrunner1987/zxing,1yvT0s/zxing,DavidLDawes/zxing,kyosho81/zxing,danielZhang0601/zxing,wangjun/zxing,YLBFDEV/zxing,RatanPaul/zxing,qingsong-xu/zxing,iris-iriswang/zxing,juoni/zxing,FloatingGuy/zxing,eddyb/zxing,lijian17/zxing,ouyangkongtong/zxing,SriramRamesh/zxing,SriramRamesh/zxing,wangdoubleyan/zxing,zonamovil/zxing,manl1100/zxing,OnecloudVideo/zxing,todotobe1/zxing,meixililu/zxing,ssakitha/QR-Code-Reader,zjcscut/zxing,t123yh/zxing,huangzl233/zxing,zonamovil/zxing,ren545457803/zxing,WB-ZZ-TEAM/zxing,cncomer/zxing,angrilove/zxing,Yi-Kun/zxing,geeklain/zxing,finch0219/zxing,andyao/zxing,tanelihuuskonen/zxing,Kabele/zxing,YuYongzhi/zxing,roudunyy/zxing,YLBFDEV/zxing,catalindavid/zxing,JasOXIII/zxing,easycold/zxing,andyao/zxing,zhangyihao/zxing,kailIII/zxing,MonkeyZZZZ/Zxing,YongHuiLuo/zxing,GeekHades/zxing,ssakitha/sakisolutions,Luise-li/zxing,ale13jo/zxing,fhchina/zxing,zjcscut/zxing,liuchaoya/zxing,nickperez1285/zxing,cnbin/zxing,qingsong-xu/zxing,ssakitha/sakisolutions,daverix/zxing,yuanhuihui/zxing,cncomer/zxing,hgl888/zxing,saif-hmk/zxing,qianchenglenger/zxing,allenmo/zxing,bestwpw/zxing,yuanhuihui/zxing,ptrnov/zxing,GeorgeMe/zxing,qianchenglenger/zxing,t123yh/zxing,wirthandrel/zxing,iris-iriswang/zxing,YongHuiLuo/zxing,WB-ZZ-TEAM/zxing,huopochuan/zxing,reidwooten99/zxing,irfanah/zxing,1yvT0s/zxing,ptrnov/zxing,Peter32/zxing,menglifei/zxing,huopochuan/zxing,zzhui1988/zxing,wangdoubleyan/zxing,shixingxing/zxing,shwethamallya89/zxing,reidwooten99/zxing,geeklain/zxing,juoni/zxing,lijian17/zxing,mig1098/zxing,joni1408/zxing,1shawn/zxing,TestSmirk/zxing,krishnanMurali/zxing,mayfourth/zxing,ctoliver/zxing,Kabele/zxing,l-dobrev/zxing,lvbaosong/zxing,zhangyihao/zxing,east119/zxing,FloatingGuy/zxing,hiagodotme/zxing,erbear/zxing,JasOXIII/zxing,Kevinsu917/zxing,angrilove/zxing,manl1100/zxing,ForeverLucky/zxing,freakynit/zxing,ikenneth/zxing,shixingxing/zxing,keqingyuan/zxing,Solvoj/zxing,Kevinsu917/zxing,erbear/zxing,bestwpw/zxing,ssakitha/QR-Code-Reader,wangxd1213/zxing,JerryChin/zxing,Akylas/zxing,cnbin/zxing,menglifei/zxing,danielZhang0601/zxing,joni1408/zxing,Akylas/zxing,HiWong/zxing,Akylas/zxing,keqingyuan/zxing,zilaiyedaren/zxing,Peter32/zxing,GeorgeMe/zxing,HiWong/zxing,ZhernakovMikhail/zxing,andyshao/zxing,graug/zxing,liboLiao/zxing,liuchaoya/zxing,befairyliu/zxing,loaf/zxing,ZhernakovMikhail/zxing,ChanJLee/zxing,eight-pack-abdominals/ZXing,jianwoo/zxing,10045125/zxing,nickperez1285/zxing,ChanJLee/zxing,meixililu/zxing,wanjingyan001/zxing,graug/zxing,Akylas/zxing,sitexa/zxing,daverix/zxing,liboLiao/zxing,BraveAction/zxing,sunil1989/zxing,catalindavid/zxing,slayerlp/zxing,andyshao/zxing,saif-hmk/zxing,tanelihuuskonen/zxing,finch0219/zxing,eight-pack-abdominals/ZXing,eddyb/zxing,RatanPaul/zxing,rustemferreira/zxing-projectx,huihui4045/zxing