Merge pull request adafruit#185 from adafruit/upload-artifacts

Prepare for release

add changelog for release

Merge pull request adafruit#113 from dhalbert/feather-sense-leds

correct LED1 pin; make volume label FTHRSNSBOOT

update changelog

Merge branch 'master' of github.com:adafruit/Adafruit_nRF52_Bootloader

update changelog and readme, ready to relase 0.2.12

Merge pull request adafruit#68 from adafruit/develop

update changelog for 0.2.11 releasing

update changelog

Add 0.2.0 to changelog

@hathach Tested, so making a new release.

update changelog