todos

BACKLOG

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- gauge-view: interval selection dropdown 

- 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

- timeseries-widget: tooltip -> show key noun   

- fix pie widget

- timeseries-gauge: overview series weights

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

- timeseries-gauge: punchcards

- distgauge: render std. deviation

- use rack websocket instead of em websocket

- caching

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

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