Bump version to 0.1.4b1.
Fixes --max-items, recursion depth exceeded. Closes ArchiveTeam/seesaw-kit#39.
Fixes regression with --max-items.
Works around spurious item events. Closes ArchiveTeam/seesaw-kit#27.
Merge commit '58045'

Conflicts:
	seesaw/__init__.py
Version 0.1.5.