add a contributing doc
add a contributing doc

zdzhjx/android-apktool,digshock/android-apktool,chenrui2014/Apktool,jianglibo/Apktool,Yaeger/Apktool,rover12421/Apktool,yunemr/Apktool,berkus/android-apktool,virustotalop/Apktool,Klozz/Apktool,hongnguyenpro/Apktool,akhirasip/Apktool,tmpgit/Apktool,lczgywzyy/Apktool,blaquee/Apktool,CheungSKei/Apktool,kaneawk/Apktool,kesuki/Apktool,guiyu/android-apktool,guiyu/android-apktool,admin-zhx/Apktool,zhakui/Apktool,bingshi/android-apktool,PiR43/Apktool,KuaiFaMaster/Apktool,ccgreen13/Apktool,pandazheng/Apktool,lczgywzyy/Apktool,fromsatellite/Apktool,kuter007/android-apktool,pwelyn/Apktool,zhanwei/android-apktool,dankoman30/Apktool,asolfre/android-apktool,PiR43/Apktool,zdzhjx/android-apktool,jasonzhong/Apktool,yujokang/Apktool,valery-barysok/Apktool,berkus/android-apktool,youleyu/android-apktool,harish123400/Apktool,youleyu/android-apktool,desword/android-apktool,kesuki/Apktool,iBotPeaches/Apktool,sawrus/Apktool,jianglibo/Apktool,androidmchen/Apktool,desword/android-apktool,androidmchen/Apktool,yunemr/Apktool,370829592/android-apktool,Yaeger/Apktool,lovely3x/Apktool,phhusson/Apktool,370829592/android-apktool,zhakui/Apktool,Klozz/Apktool,iBotPeaches/Apktool,zhic5352/Apktool,lnln1111/android-apktool,asolfre/android-apktool,fabiand93/Apktool,Benjamin-Dobell/Apktool,pwelyn/Apktool,nitinverma/Apktool,hongnguyenpro/Apktool,sawrus/Apktool,dankoman30/Apktool,Benjamin-Dobell/Apktool,virustotalop/Apktool,blaquee/Apktool,admin-zhx/Apktool,bingshi/android-apktool,HackerTool/Apktool,HackerTool/Apktool,valery-barysok/Apktool,KuaiFaMaster/Apktool,fromsatellite/Apktool,jasonzhong/Apktool,alipov/Apktool,tmpgit/Apktool,kuter007/android-apktool,pandazheng/Apktool,simtel12/Apktool,fabiand93/Apktool,draekko/Apktool,lnln1111/android-apktool,rover12421/Apktool,draekko/Apktool,CheungSKei/Apktool,digshock/android-apktool,phhusson/Apktool,chenrui2014/Apktool,zhic5352/Apktool,yujokang/Apktool,kaneawk/Apktool,akhirasip/Apktool,alipov/Apktool,simtel12/Apktool,zhanwei/android-apktool,harish123400/Apktool,ccgreen13/Apktool,nitinverma/Apktool,lovely3x/Apktool