Added card set info to cards.csv (in preparation for Naxxramus)
Added card set info to cards.csv (in preparation for Naxxramus)

pieiscool/edited-hearthbreaker,Ragowit/hearthbreaker,jirenz/CS229_Project,anuragpapineni/Hearthbreaker-evolved-agent,noa/hearthbreaker,slaymaker1907/hearthbreaker,anuragpapineni/Hearthbreaker-evolved-agent,danielyule/hearthbreaker,anuragpapineni/Hearthbreaker-evolved-agent,slaymaker1907/hearthbreaker,kingoflolz/hearthbreaker,pieiscool/edited-hearthbreaker