Added PartialOrderPlanner (aimacode#927)

* Added PartialOrderPlanner

* Added doctests

* Fix doctests

* Added tests for PartialOrderPlanner methods

* Added test for PartialOrderPlanner

* Rerun planning.ipynb

* Added notebook section for TotalOrderPlanner

* Added image

* Added notebook section for PartialOrderPlanner

* Updated README.md

* Refactor double tennis problem

* Refactored test for double_tennis_problem

* Updated README.md

* Added notebook sections for job_shop_problem and double_tennis_problem

* Updated README.md

* Fixed refinements example

* Added go_to_sfo problem

* Rename TotalOrderPlanner

* Renamed PDDL to PlanningProblem

README.md

@@ -112,11 +112,11 @@ Here is a table of algorithms, the figure, name of the algorithm in the book and
 | 10.3   | Three-Block-Tower                 | `three_block_tower`           | [`planning.py`][planning]       | Done | Included |
 | 10.7   | Cake-Problem                      | `have_cake_and_eat_cake_too`  | [`planning.py`][planning]       | Done | Included |
 | 10.9   | Graphplan                         | `GraphPlan`                   | [`planning.py`][planning]       | Done | Included |
-| 10.13  | Partial-Order-Planner             |                               |                                 |      |          |
-| 11.1   | Job-Shop-Problem-With-Resources   | `job_shop_problem`            | [`planning.py`][planning]       | Done |          |
+| 10.13  | Partial-Order-Planner             | `PartialOrderPlanner`         | [`planning.py`][planning]       | Done | Included |
+| 11.1   | Job-Shop-Problem-With-Resources   | `job_shop_problem`            | [`planning.py`][planning]       | Done | Included |
 | 11.5   | Hierarchical-Search               | `hierarchical_search`         | [`planning.py`][planning]       |      |          |
 | 11.8   | Angelic-Search                    |                               |                                 |      |          |
-| 11.10  | Doubles-tennis                    | `double_tennis_problem`       | [`planning.py`][planning]       |      |          |
+| 11.10  | Doubles-tennis                    | `double_tennis_problem`       | [`planning.py`][planning]       | Done | Included |
 | 13     | Discrete Probability Distribution | `ProbDist`                    | [`probability.py`][probability] | Done | Included |
 | 13.1   | DT-Agent                          | `DTAgent`                     | [`probability.py`][probability] |      |          |
 | 14.9   | Enumeration-Ask                   | `enumeration_ask`             | [`probability.py`][probability] | Done | Included |