Merge pull request #9 from kodgemisi/confdeck-29

Confdeck 29
fixes link on appeals#show
adds rails-timeago gem
fixes js error in conferences
updates conference dashboard by adding sidebar links, activity list(CONFDECK-34, CONFDECK-36)
fixes appeal partial title
adds commenting to appeals on conference dashboard
adds upvote and downvote functions to appeal partial
Merge pull request #10 from kodgemisi/confdeck-35

Confdeck 35
adds sponsors to conference wizard
Merge pull request #11 from kodgemisi/confdeck-28

adds sponsors to conference wizard