USB::Device#inspect show manufacturer, product and serial_number. USB::Device#open implemented. USB::DevHandle#get_string_simple implemented.
USB::Device#inspect show manufacturer, product and serial_number.
USB::Device#open implemented.
USB::DevHandle#get_string_simple implemented.


git-svn-id: aa7d12129933e08112283aab9207b8956eaf5454@332 0ecacc03-ac1b-0410-941d-e442c79421a6

akr/ruby-usb,akr/ruby-usb