#17 WIP add tool to capture the system portion of flash

based on initial encouraging feedback from @illperipherals

if more people report success, we'll need to change the install instructions
to:

esptool.py --port COM10 --baud 921600 erase_flash
esptool.py --port COM10 --baud 921600 write_flash 0x1000 system-info.bin
esptool.py --port COM10 --baud 921600 write_flash 0x10000 firmware-HELTEC-US-0.1.6.bin

bin/read-system-info.sh

@@ -0,0 +1 @@
+esptool.py --baud 921600 read_flash 0x1000 0xf000 system-info.img