spTest
warnings become errors, no opt for now
test out spanning tree.
include sim.h so we get rid of warnings.
add code to determine if a thread stops calling its blocktick.  This is for debugging on simulator
improve blockprint,
get rid of warnings
init spanning tree library
reformatting, add some debugging
get rid of warnings. debugging stuff.
reformat
debugging
add code to detect cycles in timeout blocks, reformat
get rid of spread_message
add code to dump status of a chunk
add proto for chunk2str
reformat
massive changes
make types threadtype, some renaming to deal with bbcompiler bug
script to get handler name from address from debugging output