- removal of never-adopted mini-test framework stub - test/plain: better output and cleanup - test/plain_c++: better output and re-enabled this calls for other platforms than windows (was disabled by mistake)

add_executable(callback_suite env.c handler.c sigstrings.c invokers.c do_test.c main.c print.c signature_utils.c)
target_link_libraries(callback_suite dyncallback_s)