Added coveralls info to travis.yml for a nice code coverage report.
Added coveralls info to travis.yml for a nice code coverage report.

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