Merge pull request #557 from nomis52/master

Fix the Windows build.
Added vendor string for Open DMX clone from KWMATIK
Merge pull request #560 from tuffnerdstuff/master

Added vendor string for Open DMX clone from KWMATIK
Update the plugin doc now we allow more libusb debug states
Get the usbdmx plugin working on older versions of libusb
Todo
Fix the build
Fix errors found by the latest cpplint
Fix Simon's comment
Merge pull request #561 from peternewman/libusb

Get the usbdmx plugin working with older versions of libusb
Merge branch 'master' of github.com:OpenLightingProject/ola into opc