Automatic download of remotior-sensus #381

Dear SCP team,

I use SCP to teach my students. It's the first remote sensing tool they've seen, and they're beginners. Since the switch to remotior-sensus, installing this module has made using SCP extremely complicated, especially on computers where we don't always have admin rights. However, I see that in the code, by uncommenting lines 90 to 165 of the ‘semiautomaticclassificationplugin.py’ file, remotior-sensus is downloaded automatically, which is very practical. Would it be possible to uncomment these lines in the code provided? If not, I'm afraid the manual installation of remotior-sensus will be a major obstacle to the use of SCP by the community.
In any case, many thanks for the hard work that went into developing this great tool!

All the best