v1.1.0

This release adds official support for provisioning serial numbers to devices.
Other information can be provisioned in a similar manner. See the README.md for
details.

Buildroot was also updated to 2018.05. Be sure to review the nerves_system_br
link for the changes in the embedded Linux components.

• Updated dependencies
  • nerves_system_br v1.2.0
  • Buildroot 2018.05
• New features
  • More wpa-supplicant features were enabled to support more WiFi use-cases