Update README.md

README.md

@@ -2,16 +2,20 @@ Directory Structure
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     .
     └── Search-based Planning
-        ├── bfs.py                          # breadth-first searching
-        ├── dfs.py                          # depth-first searching
-        ├── dijkstra.py                     # dijkstra's algorithm
-        └── a_star.py                       # a* algorithm
+        ├── bfs.py                                  # breadth-first
+        ├── dfs.py                                  # depth-first
+        ├── dijkstra.py                             # dijkstra's
+        ├── a_star.py                               # a*
+        ├── queue.py                                # FIFO, FILO, Priority queues
+        ├── env.py                                  # environment: working space
+        ├── motion_model.py                         # motion model, feasible input
+        ├── tools.py                                # animation, figure generation ...
     └── Stochastic Shortest Path
-        ├── value_iteration.py              # value iteration
-        ├── policy_iteration.py             # policy iteration
-        ├── Q-value_iteration.py            # Q-value iteration
-        └── Q-policy_iteration.py           # Q-policy iteration
+        ├── value_iteration.py                      # value iteration
+        ├── policy_iteration.py                     # policy iteration
+        ├── Q-value_iteration.py                    # Q-value iteration
+        └── Q-policy_iteration.py                   # Q-policy iteration
     └── Sampling-based Planning
-        ├── Sarsa.py                        # SARSA : on-policy TD control
-        └── Q-learning.py                   # Q-learning : off-policy TD control
+        ├── Sarsa.py                                # SARSA : on-policy TD control
+        └── Q-learning.py                           # Q-learning : off-policy TD control
     └── Model-free Control