no need to use std::list and no need to allocate entries on the heap.

But to make this work properly, we need move constructors on ScBigRange
and therefore ScBigAddress

Change-Id: Ic3cb1fd85051ff30fe5c5b8d8fd6cab81a7b38eb
Reviewed-on: https://gerrit.libreoffice.org/59451
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>