Better documentation.
Implicit "get" of observable values, when needed
Refactor the scene creation to his own method.
Show the number of processed entries as a label
Update the SOFFeed test to take into account that the entries are now created with the already available feed data
Add a slider to change the words count lower threshold.
Define the chart data on the model as a computed binding, bound to the threshold value: this way the chart is refreshed as the threshold is changed.