Moved sys import above the ImportError checks

Signed-off-by: Matt Ranostay <mranostay@gmail.co>
added ADC step delay and sample averaging for slightly better accuracy
minor fixes to pin definitions
Merge remote-tracking branch 'mrmorphic/master'
be1n -> ben1
added all remaining GPIO signals that are exposed by P8 and P9 onboard
switched back to distutils install and added '-f' flag to force install if bug from issue #5 is encountered.
updated install instructions
changed digitalWrite() to use set/clear registers for major speed-up - thanks to Mark Stephens (mrmorphic) for pointing that out
added a small delay to keep CPU usage down a bit - see issue #11
print stderr to terminal if not server request echos
started adding pwm config
PWM working on EHRPWM1 and EHRPWM2
added analogWrite() example program
added analogWrite() example program
Merge branch 'master' of github.com:alexanderhiam/PyBBIO
typo
fixed a few PWM bugs; thanks Carsten
Fixed serial transmit error from issue #12
avoid potential git error from failed install