ESP8266 Flasher Interface

Image overview:

• build/flash_args:bootloader/bootloader.bin : Offset 4096 (0x1000), length 26160 (0x6630)
• build/flash_args:pong_engine.bin : Offset 65536 (0x10000), length 208192 (0x32d40)
• build/flash_args:partition_table/partition-table.bin : Offset 32768 (0x8000), length 3072 (0xc00)