update: added test map in GameSceneController.java, add: textures, update: variables in TileManager.java #41 #39

merging player for integration testing

See merge request !3

update: split collision detection in map and entity in CollisionHandler.java, implemented attack method in Player.java, updated key inputs in InputHandler.java #35 #34

Update: the client can now connect to the server and exchange coordinates depending on the client addressing the server.

Update: Added Getter/Setter to the ConnectionHandler class and added a stop method for the Thread in the server class.

Merge: map into development

See merge request !1

add: CollisionHandler.java, update: implemented collision detection in IEntity.java and its implementations #18

update: implemented render method in TileManager.java, update: add getTileSprite() in ITile.java #10

add: Enum EntityType.java, update: implements Entity Interface in EnemyHandler.java, update: implemented EntityFactory.java, update: created player via factory in GameSceneController.java, update: Player.java #6

add EntityFactory.java, update GameSceneController.java, fix InputHandler.java, update Player.java #6