Update readme.md
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Added link to Travis CI build status
anuragpapineni/Hearthbreaker-evolved-agent,slaymaker1907/hearthbreaker,anuragpapineni/Hearthbreaker-evolved-agent,pieiscool/edited-hearthbreaker,slaymaker1907/hearthbreaker,Ragowit/hearthbreaker,jirenz/CS229_Project,danielyule/hearthbreaker,kingoflolz/hearthbreaker,pieiscool/edited-hearthbreaker,anuragpapineni/Hearthbreaker-evolved-agent,noa/hearthbreaker