Fixed movement of multiple entities.

Changed std::unique_ptr<Entity> to std::shared_ptr<Entity>.
Fixed pathfinding away from targets

TODO :
 - Fix oscillation around destination
 - Fix fleeing from adjacent target
 - Win conditions
 - GUI

README.md

@@ -5,10 +5,20 @@ Project Maat is the codename of my C++ course "mini-project" based on the quote
 
 This game is aimed to be a puzzle game in which the player sets different laws for the world and the people within it as to control what happens after hitting "play" and achieve the level's goal. I was inspired both by [The Incredible Machine](https://en.wikipedia.org/wiki/The_Incredible_Machine_(video_game)) and its successors and by a much more recent game : [Baba is you](https://en.wikipedia.org/wiki/Baba_Is_You).
 
+## Dependencies
+
+The following libraries must be installed on your system or findable by CMake to be able to build:
+ - SFML
+ - TGui
+ - PugiXML
+ - GTest
+
 ## Structure
 
 ![UML Diagram](UML_Class_Diagram.png)
 
+The class diagram omits most constructors and getters.
+
 ## TODO
 
  - [x] Level
@@ -25,6 +35,7 @@ This game is aimed to be a puzzle game in which the player sets different laws f
   - [x] Interaction with entities
   - [ ] Parsing of rules and creation of subsequent decorators
   - [x] Find optimal target for pathfinding
+  - [ ] Other rules (Waiting...)
  - [ ] Graphics
   - [x] Scene rendering
   - [ ] UI
@@ -33,6 +44,7 @@ This game is aimed to be a puzzle game in which the player sets different laws f
   - [ ] Transition from starting to running state and vice-versa
   - [ ] Entity behaviour evolution
   - [x] Rule application
-  - [ ] Saving state through serialization ?
+  - [ ] Win condition
+  - [ ] ~~Saving state through serialization ?~~
  - [ ] UML
  - [ ] Unit tests