Time series stored in the database for each project

- Progress TS [Cumulative]
  Progress TS [Averaged (small window)]
  Progress TS [Averaged (large window)]

  Denote the amount of code changes during (commit sizes) during
  the analysis time range. "small window" uses a rolling median with
  one day as window length; "large window" has one month as window size.
  Cumulative just adds up all values.
- <mailing list name> activity
  Raw activity on a given mailing list over time
