Reply to a foursquare checkin

add_4sq_reply.rb

  def create_reply(message)
    reply_url = "https://api.foursquare.com/v2/checkins/#{checkin_id}/reply"
    url = URI.parse(reply_url)
    req = Net::HTTP::Post.new(url.path)
    # token is a one time use secure random string
    params = { :url => "http://www.hashtagmom.com/notify_mom/#{token}/",
      :text => message,
      :oauth_token => user.foursquare_access_token,
      :v => "20120827" }
    req.set_form_data(params)
    http = Net::HTTP.new(url.host, url.port)
    http.use_ssl = true
    response = http.request(req)
    puts response
  end