Initial commit
added Foursquare::Venues#client
added Foursquare::Venues#options
added categories
added #with_category
added Foursquare::Venues#within
added Foursquare::Venues#top
added Foursquare::Venues#for
added Foursquare::Venues#above
corrected #above spec
added accuracy to #near and #above
refactored chaining
renamed #for argument to checkin_or_match_or_specials
chain methods while retaining options
search and enumerate venues
random selects venue
fixed accuracy for #near and #above
refactored #each
changed accuracy keys to string
support sub Class