Merge branch 'v1.0' of github.com:paulasmuth/fnordmetric2 into v1.0

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- password protection

- store per-session-data

- callback on session-flush

- use rack websocket instead of em websocket

- gauge-view: interval selection dropdown 

- report: print number of samples, interval-size on topright via scalaexp-buttonstyle

- distgauge: valuerange-option (dangerous!)

- timeseries-widget: tooltip -> show key noun   

- fix pie widget

- timeseries-gauge: overview series weights

- caching

- overview view: gauge list (a'la github graphs landing)

- overview view: num active users, system stats (realtime widget)

- gauge garbage-collection

- split up fnordmetric.namespace block into multiple files

- fix html widget

- fix toplist widget

  > less ram usage / garbage collection / single tick

  > fnordmetric:announce redis pusub event-data instead of event_id

  > config in multiple files

  > per session data / callback on session flush

    @all_ticks = ticks_in(@interval, tick, 1)

    @all_ticks.each do |_tick|

      field_values_at(_tick, :limit => top_k, :append => :toplist).each do |item, count|

      field_values_at(_tick, :limit => top_k, :append => :toplist).each do |*args|

        item, count = args.flatten[0..1] # what the fnord... ~paul

        @toplist.incr_item(_tick, item, count)

      end

    end