Just got to start looking into this now, in time to see your question.

I found to check libusb:

dpkg -l libusb*
[download]

Which outputs a slew of info like this (click the download link below it to see it without line-wrap). Note this is on my Linux Mint laptop, not a Pi, but it'll be the same command:

spek@sainai:~/repos/app-envui$ dpkg -l libusb*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/T
+rig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                   Version          Architecture     Descripti
+on
+++-======================-================-================-=========
+=========================================
ii  libusb-0.1-4:amd64     2:0.1.12-23.3ubu amd64            userspace
+ USB programming library
ii  libusb-1.0-0:amd64     2:1.0.17-1ubuntu amd64            userspace
+ USB programming library
ii  libusb-1.0-0:i386      2:1.0.17-1ubuntu i386             userspace
+ USB programming library
un  libusb0                <none>           <none>           (no descr
+iption available)
ii  libusbmuxd2            1.0.8-2ubuntu1   amd64            USB multi
+plexor daemon for iPhone and
[download]

It'll be a bit before I can test it out on my Pi(s), but when I do, I will report back with anything I can find to get this working.