docs: function parseHttpHeaders(headers) {
      var meta = {};
      
      for (var headerName in headers) {
          var headerValue = headers[headerName];
          
          if (headerName=="x-ratelimit-limit") {
              meta.rateLimit = headerValue;
          } else if (headerName=="x-ratelimit-remaining") {
              meta.rateLimitRemaining = headerValue;
          } else if (headerName=="x-ratelimit-reset") {
              meta.rateLimitReset = headerValue;
          } else if (headerName=="link") {
              var regexp = /<(.+)>; rel=(.+),?/g;
              var match;
              do {
                  match = regexp.exec(headerValue);
                  if (match) {
                      var url = match[1];
                      var rel = match[2];
                      
                      var regexp2 = /[\?|&]page=(\d+)/;
                      var match2 = regexp2.exec(url);
                      if (match2) {
                          var page = match2[1];
                          if (rel=='prev') {
                              meta.prevPage = page;
                          } else if (rel=='next') {
                              meta.nextPage = page;
                          } else if (rel=='last') {
                              meta.lastPage = page;
                          }
                      }
                  }
              } while (match);
          } 
      }
      
      return meta;
  }