Cleanup resources when device handle is deleted. closes #65.
Cleanup resources when device handle is deleted. closes #65.

Legacy module has no explicity resource cleanup functions, so we free
allocated resources in the __del__ method.

AlanJAS/pyusb,kopchik/pyusb,makerbot/pyusb,h3nj3/pyusb,kopchik/pyusb,karlp/pyusb,swinman/pyusb,karlp/pyusb,makerbot/pyusb,rabryan/pyusb,rabryan/pyusb,h3nj3/pyusb,AlanJAS/pyusb,swinman/pyusb