Libusb with timeout

[jeanlego]

rebased

• https://github.com/andersson/qdl/pull/12
• https://github.com/andersson/qdl/pull/11
• https://github.com/nullog/qdl/pull/1 to be merged on master

[andersson]

This is unmergable. Proposal for libusb introduction alone is made in #59 .