dust off and start adding validation; add some backslash tests
add backslashes in prereq, rule, comments
add comment_test; move test import to inside the run function so can use this code from inside the other test modules; add more verbosity to the run all tests function
start adding full proper validation; use the run_tests module to run the test (eliminate some copy/paste code)
refactor rule RHS tokenizer; add backslash support to comments, rules, assignments (needs more testing)