concept for preventing a memory leak for parent close callback
started documentation
callback given to run is invoked directly and not via once
Merge branch 'master' into weaken
improved weakening test
return the Child object, getting closer to having complete documentation
safer weakening
tweak pod
added meta files
speed up weaken test
remove import of Storable if using a custom serializer/deserializer. Also clean up fork_call
MANIFEST again
prefer an explicit return value for fork_call