add exe folder
create exe to simulate osrusbfx2 of WDK
add step4
changed exe
removed warning and r/w can work now
catch up usb_skeleton.c 3.10
code changes to catch up with 3.10 usb sample
0711
added some comments for understanding
make codes looks better for entry and exit for every function
comply with linux code style 1
complete comply with linux coding style