~nch/onward

wrote getword routine, and fixed data/return stack
added enter subroutine. it's basically a forth now :)
added memory operators
added some more basic instructions
moved repl code out, started writing based on jonesforth
ugg - forgot to include the main sorce
named project
added loop to read next token and hash the value
added compile mode
started working on prototype impl
added basic read/write prompt