Optimizations and Bugfixes

[dnlmlr]

• Changed the hidlib backend on linux from libusb-1.0 to hidraw, to fix an upload bug on linux.
• Changed the help function (--help) to be more helpful.
• Made some minor optimizations to readability and the code itself.

[a3f]

Could you rebase (git pull --rebase) on newest master? I pushed CI integration to help with reviewing the patch. Thanks!

[dnlmlr]

Rebase is done