* add flash demo from RAM
* clean up linker script and flags
* Add hercules test-app: link script and minimal c file
`make CCS_ROOT=/c/ti/ccs1031/ccs/tools/compiler/ti-cgt-arm_20.2.4.LTS F021_DIR=/c/ti/Hercules/F021\ Flash\ API/02.01.01`
* 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.