CSSをいじって外観を調整。
Merge branch 'master' of github.com:irasally/fizzbuzzgame

Conflicts:
	css/fizzbuzz.css
Merge branch 'master' of github.com:freru/fizzbuzzgame into sound
効果音再生処理を実装。
Merge branch 'sound'
Merge branch 'master' of github.com:freru/fizzbuzzgame
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Merge branch 'master' of github.com:freru/fizzbuzzgame
Update README.md
Merge pull request #16 from jsakamoto/master

見た目の調整と、効果音再生の機能を追加