Revert "Change signature of `org-dp-rewire'."

This reverts commit bf5d9730133ebfd6bd4b28676c84510bddea2941.
Restore 'org-dp-create' to new version.
Fix 'org-dp-create' docstring.
Make 'org-dp-rewire' work with elems w/o beg/end.

Elements created with 'org-dp-create' don't have position data like
:begin, :end or :post-affiliated and thus need special treatment.
Fix processing of 'replace' in org-dp-prompt.
Fix 'org-dp-filter-node-props'.
Implement 'org-dp-map'.
Fix docstring of 'org-dp-map'.