The following resources may be useful working with the Bluefruit nRF52 Feather:
This is if you want to program in MyNewt support - the bootloader will not work with Arduino!
You can use adalink and a jlink to program this in via SWD to address 0 with something like:
adalink -v nrf52832 -p jlink -b feather52_boot_bleuart.bin 0
(Don't forget you may have to erase the chip)
The Bluefruit nRF52 Feather uses the MDBT42Q module from Raytac. Details on the module, including FCC and other certifications are available in the document below: