Allow the chart count widget to have a time period. When present, apply the time period and display a legend detailing what the time period is.

Rename QuestionChartWidget to TermCountChartWidget as this is what it does, and pull the actual data from the transport layer.

Ensure dashboard displays error in case of missing or faulty widget, rather than causing the whole application to fail.

Nominal styles for graph - as only have one type not really easy to see how other  colours would work. Style now more in keeping with minimal styles of tables etc..

Implement the chart widget, and include the flot library. Data is communicated from Django to the javascript code using html5 data attributes, emembed using a Django custom filter.