Added initial draft makefile.
Experimental work on trying to get continuous todo lines grouped but
there is no performant way to do it in a single loop so considering
moving this to a report generation command.
Ongoing work on the todo handling logic.
Work on the doc.pages.push command.
Tweaks to doc task.
Added the git.clean? command.
Work on the todo tests.
Moved the task-rake(7) and task-ant(7) tasks to ext/build.
Added a stub for task-project(7) and removed the +o nounset from
delegate(3).
Updated documentation and work on task-project(7).