Added coverage files to .gitignore
Added coverage files to .gitignore

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