dates, and priority as importance * urgency

First a big thanks for roundup.  It's very useful.

We're currently using a mixture of roundup, RT, and trello for
various activities, mostly generic ticket management rather
than tracking "issues" in particular.

There are a couple of features that would be great to have in roundup.
Not being all that familiar with the architecture, I am unsure whether
these would be doable as config customisations, or whether they'd
involve more coding.  This is why I'm initially posting to the users
list about this.

We're currently using the default config as shipped with Debian 7.0.

First is dates, with notifications.  Example: if a supplier says something
will be delivered on a particular date, one wants to "wait" until that
date, and then chase them.  In general it should be possible to put a
ticket into a "waiting until this date" state.  Another example: a hard
deadline: if we don't file our license renewal by this date, we lose a 
license.

I don't know whether roundup should know the "types" of deadline, such
as "waiting on", "deadline", etc.  Or whether the user should be able
to set up their own, with notification parameters.  I don't want to go
too deep into the design at this point; rather, I just want to provide
basic illustration of the feature.

Another feature is making priority a composite attribute.  At the moment
it has 5 possible values (in the default config) from wish thru bug to 
critical.  Many of us find it useful to think of priority as the product
of importance * urgency.  I won't try to lay this out in full here, as
googling for "importance urgency" gives pretty good results.

There is possible integration between the two features.  As a hard 
deadline approaches, it would become more urgent, thus increasing the
overall priority.  Importance would not change as a function of time (tho
of course a user may re-evaluated the importance when reviewing it).

Potentially willing to fund work to get these features.  Would want more
design up front before diving in.  Would be delighted to hear it's all
already achievable via basic config, too.

  cheers, Tom.

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