initial outline of RTE sublanguage middle-end implementation
update test-fail expects with EBOOL/EINT
free syntax tokens
footprint: language body footprints (prs,chp,rte,spec) now allocated
on first-use.
Binary object format updated (process footprints slightly smaller).
initial implementation of RTE middle-end
fixes: process-definition was missing RTE body
middle-end dumping now uses operator char, not class enum member
added check for undefined output atomic expressions
check for atomic redefinition and catch as error