Bump to 1.6.0

Bump to 1.5.0

Bump to 1.4.1

add some delays to slow down fast bitbang on demand

Bump to 1.3.3

fix dox

Merge branch 'master' of github.com:adafruit/Adafruit_BusIO

Bumped to 1.3.0

Merge pull request adafruit#25 from caternuson/iss24

Remove delay from write_then_read()

bump patch