Hi everyone,

here is a patch that allows to have multiple date trees or iso-week trees
in a single file by allowing to specify the property name that will be used
to place the tree.  The property name can be set in org-capture-templates,
individually for every template if so desired.  I use that to have three
different kind of journals in a single file.

Any objections gains me to merge this change into Master?

Carsten