Fix template name in comment
Add new custom template: Markdown lite

Based on the original, but without done dates or notes
Add new custom template: TaskPaper lite notes

Include notes, but no @context or @project tags
Document custom usage examples
Export only the remaining projects and tasks

Prune & exclude completed tasks:

-a prune -E -a done=any
Autoexport remaining TMM tasks

Replaces former manually maintained TaskPaper file
Merge branch 'feature/new-templates' into develop

* feature/new-templates:
  Autoexport remaining TMM tasks
  Export only the remaining projects and tasks
  Document custom usage examples
  Add new custom template: TaskPaper lite notes
  Add new custom template: Markdown lite
  Fix template name in comment