Added license
Build for STm32f10X, The value line discovery board. Let linker manage RAM, so easier to combine forth with other code. This changed the defvar macro to reserver space in a data section, named the text section .text.forth and tweaked the linker file to load the correct sections.
Refactor range handling for isvalidaddress. Add labels for first and last bultin word.
Build with fewer builtin words for now, refactor knockon from last_builtin_word
Merge branch 'stm32f100' of github.com:LawrenceK/CoreForth into stm32f100