0.01: Initial version
0.02: Add support for ZIPs
      Find and download ZIPs direct from the Espruino website
      Take 'beta' tag off
0.03: Improve bootloader update safety. Now sets unsafeFlash:1 to allow flash with 2v11 and later
      Add CRC checks for common bootloaders that we know don't work
0.04: Include a precompiled bootloader for easy bootloader updates
0.05: Rename Bootloader->DFU and add explanation to avoid confusion with Bootloader app
0.06: Lower chunk size to 1024 (from 2048) to make firmware updates more reliable
