Start work on 1:0.2.96.1
gpu-manager.c: make sure to walk properly the /dev/dri dir

This prevents the program from stopping when, for example
/dev/dri/card1 is available while /dev/dri/card0 is not.
gpu-manager.c: make sure to unload nvidia-uvm or nvidia won't be unloaded
Release 1:0.2.96.1