added breakpoint functionality to submit module

if you add a '#' to the beginning of a line in the submit csv, the
module will stop parsing the file
turned off lua garbage collection in some cases

commented out the lua_gc line causing a full lua gc cycle to run
everytime a resource was destroyed.  the permanent fix for this is to
either expose an api class to manually trigger gc, only perform an
incremental step after destroying, let lua handle gc, or rely on other
destroy methods being called.
added valgrind convenience calls to makefile

you can invoke valgrind or callgrind with 'make valgrind' and 'make
callgrind' respectively