Fix the build.
Fix the build on platforms without hotplug support.
Switch the Sync plugin to use the widget factories as well.
Fix some documentation.
Remove the old LibUsbUtils
Fix a crashing bug, add better logging for libusb.
Merge branch 'libusb' of github.com:nomis52/ola into libusb
Add the README file explaining how the libusb plugin is laid out.
Merge branch 'libusb' of github.com:nomis52/ola into libusb
Minor code formatting tweaks.
Fix the flag name.
Move the Async USB TX code into a common class
Add the AsyncUsbSender.
Clean up some more documentation.
Add the async velleman plugin.
Move the libusb calls behind an adaptor class.
Minor cleanup to the libusb plugin
Add initial support for the fadecandy widget.

Peter to test.
Add the missing fadecandy files.
Fix a lint warning