1 isochronous endpoint I/O
2 optional timerfd support (runtime detection)
4 notifications of hotplugged/unplugged devices
6 use poll() rather than select()?
7 abstraction for cross-platform-ness
9 API style/naming points to reconsider
10 =====================================
12 struct libusb_(bulk|control)_transfer or parameters?
14 urbh in general (should this be a transfer handle?)
16 config struct/function naming