A generic library / utility for interacting with the STM32 factory bootloader, see [AN3155](https://www.st.com/content/ccc/resource/technical/document/application_note/51/5f/03/1e/bd/9b/45/be/CD00264342.pdf/files/CD00264342.pdf/jcr:content/translations/en.CD00264342.pdf) for protocol details.
WIP. Runs under linux, Read / Write working, other functions yet to be tested / implemented.