track and display velocity (possibly automatically adjust available Pomodoros)

From Wikipedia: "Velocity is a measure of productivity sometimes used in Agile software development. Velocity tracking is the act of measuring said velocity. The velocity is calculated by counting the number of units of work completed in a certain interval, determined at the start of the project."

It would be nice if the app would track how many Pomodoros I complete per day and either just display that number next to the "Available" input on the plan screen, or automatically adjust that input.