Feature/#747 more labels in qgis symbology m1

Created by: das-g

closes #747 (closed)

Transplanted changes from geometalab/osmaxx-symbology#102 with

git --git-dir=../osmaxx-symbology/.git format-patch efa5a9b37f655129e0c502697b6964c0cbee3255..HEAD --stdout | sed 's/\.qgs$/.qgs.jinja2/' | git am --directory=osmaxx/conversion/converters/converter_gis/symbology/templates -p3