Changes for version 0.20
- Allows times for tasks and work to be expressed in minutes. "2h" is the same as "120m".
- Added column headings to default output
- Task indent level may now be done with asterisks as well as dashes, and the indent level may have whitespace following it. The following are all valid:
- -Level 1 the old way --Level 2 the old way
- Level 3 with whitespace ***Level 3 the new way
- Level 4 the new way with whitespace --**IMPORTANT** (Level 2, task name "**IMPORTANT**")