Mention the gem.
Mention the gem.

Fixes #31.

Daniel15/shields,malditogeek/shields,spalger/shields,sanemat/shields,clintonhalpin/shields,MatzFan/shields,wanji/shields,gcochard/shields,rayners/shields,HossainKhademian/Shields,driskell/shields,dnvriend/shields,tomap/shields,zackp30/shields,rmuhamedgaliev/shields,Toyz/ShieldCreator,MGDIS/shields,adjohnson916/shields,pine613/shields,mahirk/shields,badges/shields,Miovision/shields,jennifer421/shields,rexxars/shields,igormukhingmailcom/shields,spalger/shields,pine613/shields,HossainKhademian/Shields,clintonhalpin/shields,Daniel15/shields,mateusrevoredo/shields,sebyddd/shields,Borgaard/shields,andyshinn/shields,RIAEvangelist/shields,igormukhingmailcom/shields,malditogeek/shields,RIAEvangelist/shields,PeeHaa/shields,driskell/shields,freezy-sk/shields,rayners/shields,MatzFan/shields,badges/shields,IveWong/shields,Borgaard/shields,rexxars/shields,sebyddd/shields,allenmanning/shields,sanemat/shields,gcochard/shields,szepeviktor/shields,freezy-sk/shields,andyshinn/shields,jennifer421/shields,tomap/shields,mahirk/shields,krak3n/shields,PeeHaa/shields,mkiisoft/shields,workhorsy/shields,bishop335/shields,IveWong/shields,workhorsy/shields,piperchester/shields,badges/shields,mkiisoft/shields,szepeviktor/shields,marktopper/shields,zackp30/shields,wanji/shields,olivierlacan/shields,rmuhamedgaliev/shields,badges/gh-badges,Miovision/shields,mateusrevoredo/shields,roomthily/shields,adjohnson916/shields,Miovision/shields,krak3n/shields,bishop335/shields,dnvriend/shields,allenmanning/shields,piperchester/shields,roomthily/shields,MGDIS/shields,marktopper/shields