Expanded error msg when ueyeusbdrc call fails

Now also suggestion to check that you have permission to run it.
Change --home-on-start arg to --skip-home-on-start

I believe that it was orginally set up during development when the default was
to skip the home. Now that the default is to home every time, you have to
choose to skip it.
Add selection of target video directory

It is achieved by changing to the directory before making the video call
Add --target-video-dir argument