added I2C config for kernel 3.2
Merge branch 'master' of github.com:alexanderhiam/PyBBIO
missing sysfs.
add some delay after loading GPIO overlay
temporary hack to get USR LEDs working again
removed outdated install instructions
convert GPIO to using sysfs kernel driver instead of mmap (becasue it's the right thing to do!)
fixed typo in PWM config
update version to 0.8.5
update changelog
added the extension instance for _sysfs.c