import-mbox.py fails to unescape >From lines
import-mbox.py fails to unescape >From lines

Part of #212
jimjag/ponymail,jimjag/ponymail,quenda/ponymail,quenda/ponymail,Humbedooh/ponymail,jimjag/ponymail,jimjag/ponymail,Humbedooh/ponymail,Humbedooh/ponymail,quenda/ponymail