Update documentation with minimum Python version info.
Update documentation with minimum Python version info.


git-svn-id: 677046dcbf69c800652a2d039b7cbb34e6c7e766@77 3043e840-054b-0410-bc1a-858b58f158f7

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