NEW FEATURES to be added in decreasing order of importance.

Add support for CWOP.

Allow rain-to-date to be added to a partial rainyear. (Unfortunately,
there is no elegant way of doing this with the present architecture!)

Fix scaling for aggregate interval of a week, so it starts on a Sunday.

Optional start-of-week besides Sunday.

Ability to set parameters such as lat, lon, altitude on the VP2

Investigate reducing memory requirements by computing statistical quantities
on the fly, instead of storing them in memory.

Dynamic web updates, using AJAX.

Port to Windows.
