* HiFive1 HAL Support for PLL Clock, UART, RTC and Flash QSPI Erase/Write.
* HiFive1 update demo application for accepting firmware updates over UART.
* Added test-update-server application for pushing firmware image over UART.
* Fixes for building with `make SIGN=ECC256`.
* Improvements to wolfCrypt `user_settings.h`.
* General library cleanup (license headers and formatting)
* Updated the wolfSSL submodule to latest.
* Documentation updates including new `Targets.md` section for hardare instructions.
- Added wolfBoot version
- Added extra 16bit header tag to identify the image type and authentication
- Implemented optional in-ram self-update of the bootloader, with version control
and authentication mechanism (not fail-safe)
David Garske
Daniele Lacamera