-> Functionality "Intepret Tamsin program" is implemented by
-> shell command
-> "./bin/tamsin loadngo %(test-body-file) < %(test-input-file)"

-> Functionality "Intepret Tamsin program (pre- & post-processed)"
-> is implemented by
-> shell command "cat %(test-input-file) | bin/inhex | bin/tamsin loadngo %(test-body-file) | bin/hexout"