Temp hunterised v19.24.8

Official v19.24.8 plus hunter changes from v19.23, although with significant mods because original CMakeLists.txt has changed somewhat.

Hunterised v19.24.8

Official v19.24.8 plus hunter changes from v19.23, although with significant mods because original CMakeLists.txt has changed somewhat.

Hunterised version of v19.23

Official v19.23 version with standard hunterisation changes

Hunterised version of v19.22

Official v19.22 plus hunterisation extras

Huntersised v19.21

Official v19.21 with hunterisation patches cherry-picked from previous versions.

Hunterised version of 19.19 with OpenCV updates

Hunterised version of upstream 19.19 with the addition of recent OpenCV changes for davisking#1949 and davisking#1963 merged from upstream master.

Hunterised version of 19.19

Cherry pick the ruslo changes made to 19.17 on top of upstream 19.19