change the paper and label sizes to suit the capture
function() {
			var self = this;
			var idx = self.capture_idx;
      self.w = (
        (idx.end - idx.start) / 1000 * self.pix_per_sec) + 
        margin[1] + margin[3];
      self.h = margin[0] + margin[2];
      for (var s in idx.servers) {
        self.h += (self.server_pad * 2);
        self.h += ((idx.servers[s][1].length) * self.conn_pad);
      }
			console.log("resizing to " + self.w + " x " + self.h);
			paper.setSize(self.w, self.h);
			labels.setSize(self.label_w, self.h);
		}