Add time reporting by day

[Danny Dearlove]

At the moment the only options for display of times are by hour (which is not helpful for larger projects) or "pretty" which turns out to be a confusing mixture of days, hours, minutes etc - when you are reporting on periods of varying duration.

https://mavens.atlassian.net/plugins/servlet/ac/timereports/configuration

Please could you add options to display by day in particular (and possibly by week, month, minute).

[Andriy Zhdanov]

fix issue#959: Duration Type config option

→ <<cset a162f32ad29d>>