OrgSchedule

# GRAMMAR:
#   _Start              -> "*" "GOALS" "\n" _Goals

#   _Goals              -> _Goal
#                        | _Goal _Goals

#   _Goal               -> "**" <active> <text> "\n" _Projects

#   _Projects           -> _Project
#                        | _Project Projects

#   _Project            -> "***" <active> <text> "\n"> _ProjectChildren

#   _ProjectChildren    -> _SubProjects
#                        | _Tasks

#   _Subprojects        -> _Subproject
#                        | _Subproject _Subprojects

#   _Subproject         -> "****" <active> <text> "\n" _Tasks

#   _Tasks              -> _Task
#                        | _Tasks

#   _Task               -> "-" <completion> <text> "\n"
#                        | "-" <completion> <text> "\n" _Subtasks

#   _Subtasks           -> _Subtask
#                        | _Subtasks

#   _Subtask            -> "  -" <completion> <text> "\n"

Examples: 

todo1.org:
* GOALS
** + goal: g1
*** + project: p1
- [ ] task: t1

todo2.org:
* GOALS
** + goal: g1
*** + project: p1
- [ ] task: t1
  - [ ] subtask: st1

todo3.org:
* GOALS
** + goal: g1
*** + project: p1
**** + subproject: sp1
- [ ] task: t1

todo4.org:
* GOALS
** + goal: g1
*** + project: p1
**** + subproject: sp1
- [ ] task: t1
  - [ ] subtask: st1