Improve usability of TODO Lists about cropplanning HOT 5 CLOSED

This functionality is in place and working, but needs some cleaning up.  Adding 
the
ability to print lists for "this month", "next month", etc.

There are also some unsupported "features" already in place, for instance: 
"include
all unplanted records" vs "only include unplanted records for the specified time
period" vs "include ALL records for the specified time period".

It would be nice to nice to add a way for users to customize which columns are
included in the exported lists, as well.

These list should also include a summary line at the bottom of each list.  It 
should
display totals for: flats, rowfeet, beds, etc

This is already supported by the data model, so it's just a matter of adding it 
to
the lists.

We might as well add (in very small text) the date (and possibly time) when the 
list
of generated.

Or would this not be useful?

This issue is complete; functionality in place.  Breaking sub-issues out into 
their
own issues as issue 38, issue 39 and issue 40.