Merge pull request adafruit#1999 from tannewt/turtleboosters

Track a dirty area for in-memory bitmaps

Merge pull request adafruit#1993 from dhalbert/ble-scanner

bleio: add central and scanner functionality, cleanup bleio API, some code restructure

Merge pull request adafruit#1990 from kattni/pyruler

Adding PyRuler to CircuitPython.

Merge pull request adafruit#1975 from tannewt/merge_in_402

Merge in 4.0.2

Merge pull request adafruit#1972 from tannewt/validate_mpy_load

Validate mpy load

Merge pull request adafruit#1943 from adafruit/4.0.x

Merge in gamepadshift fix to master.

Merge pull request adafruit#1904 from pewpew-game/4.0.x

Bump circuitpython-stage to 1.0.2

Merge pull request adafruit#1894 from adafruit/tannewt-patch-5

Auto-build pygamer

Merge pull request adafruit#1888 from tannewt/iterable_group

Improvements to Group

Merge pull request adafruit#1885 from adafruit/tannewt-patch-11

Have travis build capablerobot_usbhub