meetup api member checkins during meetups

added meetup.com checkins api so that on days that we have meetups, once
a member checks in, they're icon from meetup will display on index,
under the button in ".carousel-caption".

working demo here: http://dev.bowdenweb.com/od/cfa/c4hrva-landing/

NOTE: the demo is "working" but not how it will in production. it pulls the next meetup, so unless were actually at one, it would never appear to be functional. so i added a past event's id that has check-in data. 

also, still didn't change whatever it is that makes github email me and tell me the save to my repo failed. meh.