Add "from_date" and "to_date" to track service (similar to playlog)

Compare feedback by @jackie in #10 (closed)

changed milestone to %1.0-alpha2 — Precise Pheasant

added P3 label

mentioned in issue #10 (closed)

added To Do label

added Doing label and removed To Do label

closed

removed Doing label

mentioned in commit b76f78c7