Merge pull request adafruit#2459 from hierophect/stm32-spi-oneline

STM32: Allow simplex SPI

Merge pull request adafruit#812 from dhalbert/2.x-filesystem-writabil…

…ity-on-boot

2.x: Fix regression preventing remount as readwrite in boot.py

Merge pull request adafruit#802 from dhalbert/2.x-filesystem-work

2.x: handle bad power on reset better

Merge pull request adafruit#776 from dhalbert/hid_gamepad

HID gamepad support

Merge pull request adafruit#747 from dhalbert/reformat

add storage.erase_filesystem() to erase and reformat CIRCUITPY

Merge pull request adafruit#678 from tannewt/m0_no_timer_fix

Correct NO_TIMER index value for SAMD21.

Merge pull request adafruit#658 from tannewt/driver_page_update

Update driver links (for 2.x) including categories!

Merge pull request adafruit#650 from tannewt/merge_2x

Merge in commits from 2.x branch.

Merge pull request adafruit#580 from ladyada/pirkey

pIRKey tested w/ hardware

Merge pull request adafruit#541 from ladyada/itsybitsy_m0_fixes

Itsybitsy m0 fixes