fixed field_values_at, bar_widget

- caching

- pie widget :)

- fix html, toplist, bar widget

- fix html, toplist

- timeseries-widget: cardinal on/off should be skeuomorph

- namespace picker in sidebar

  def field_values_at(time, opts={}, &block)

    opts[:limit] ||= (opts[:max_fields] || 50)

    sync_redis.zrevrange(

    res = sync_redis.zrevrange(

      tick_key(time, opts[:append]), 

      0, opts[:limit]-1, 

      :withscores => true

    ).in_groups_of(2).map do |key, val|

      [key, calculate_value(val, time, opts, block)]

    end

    if res.first.is_a?(Array) && res.first.first.is_a?(Array)

      res[0]

    else

      res

    end

  end

  def field_values_total(time)

        data: []

      }];

      if (values.length == 0) {

      if (values.length == 0)

        values.push(["No data yet",1]);

      }

      for(var n=0; n < values.length; n++){

        gconfig.series[0].data.push({