Regions are specified as a binary tree of region nodes, and each node must
either be a terminal node or specify one or two child nodes.

Nodes contains two child nodes:
  RegionNodeDataTypeAnd = 0x00000001,
  RegionNodeDataTypeOr = 0x00000002,
  RegionNodeDataTypeXor = 0x00000003,
  RegionNodeDataTypeExclude = 0x00000004,
  RegionNodeDataTypeComplement = 0x00000005,

Terminal nodes:
  RegionNodeDataTypeRect = 0x10000000,
  RegionNodeDataTypePath = 0x10000001,
  RegionNodeDataTypeEmpty = 0x10000002,
  RegionNodeDataTypeInfinite = 0x10000003

RegionNode must contain at least one element.

Change-Id: I668e5892701b979f09bcf5bbce44a43226676192
Reviewed-on: https://gerrit.libreoffice.org/44324Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>
Tested-by: Bartosz Kosiorek <gang65@poczta.onet.pl>