TaskLite 0.3

• Add edit command to edit YAML version of task in $EDITOR (1add89e)
• Add several un* commands to erase fields (0f09c3d)
• Only execute trigger to set closed_utc after state changed (395a8e0)
• Show descriptive variable names in brief help text (10f8cf6)
• Hide aliases from main help (c52df72)
• Display alias errors even with subarguments (c52df72)
• Fix parsing of timestamp part in ULIDs for small timestamp values (258df47)
• Also display full version slug with tl version (0c292d1)
• Remove unnecessary import logging (c04b894)
• Add git hash to the version string (5f7b1ef)
• Create config directory if it does not exist (8d0657c)