various fixes to darcs conversion script 1. removed files were missed 2. hidden files in top directory were not added/removed correctly 3. suppressed spurious warning on adding new files. 4. hg changeset now checked in with original author and date 5. __file__ not supported by pdb.py

changeset = '{rev}{tags}{parents}   {node|short}   {date|isodate}   {author|user}\n  {desc|firstline|strip}\n\n'
changeset_quiet = '{rev}:{node|short}\n'
start_tags = '['
tag = '{tag},'
last_tag = '{tag}]'
start_parents = ':'
parent = '{rev},'
last_parent = '{rev}'