Exclude children of excluded parents when doing package discovery. Fixes #184.
Added tag 3.4.4 for changeset 0917d575d260
Bumped to 3.4.5 in preparation for next release.
Python2.x needs encode as well.
Fix typo in formats.txt
Extract first_line_re function to encapsulate compatibility mechanism
Move import to the top
Re-arrange _first_line_re to put core functionality at the top level