started adding C extensions for low-level routines
working prototype of getReg and setReg
working prototype of multi-file structure with c extensions and support for systems besides beaglebone
added pwm pins
documentation
c extension source now in package
check for old PyBBIO install
cleaned up and commented c extension source
test for digitalWrite speed
, new install instructions, update to v0.6
fixed crazy formatting
added changelog
remove test code
update install instructions
version to 0.6 in setup script
moved some routines to bbio/util.py so drivers can access them
Merge branch 'master' into experimental