Meraki OpenWRT 2.0 release

This is a version of OpenWRT 2.0 (beta) for the Meraki Mini,
provided as a courtesy to researchers and hobbiysts interested
in building their own copies of the Linux portion of the firmware. 

The build process resembles the standard OpenWRT release:
  cd openwrt
  cp config-ar531x .config
  make oldconfig
  make 
  cd ../base
  make V=99


Once the build process is complete, you can re-flash a node to your
custom firmware image by coping build_ar531x/upgrade.sh to a node
and running it. A raw ELF binary is provided for those using serial
adapters at build_ar531x/stage2-embedded.elf.

Warning: Installing custom firmware may leave your Mini is a non-working
state. Meraki devices running custom firmware are not covered by
the warranty policy and are not eligible for support.