Merge branch 'feat/part-three' into 'master'

.gitlab-ci.yml

README.md

pom.xml

src/main/java/edu/ntnu/idatt2001/group_30/Main.java

src/main/java/edu/ntnu/idatt2001/group_30/paths/Main.java

...ava/edu/ntnu/idatt2001/group_30/paths/PathsSingleton.java

.../ntnu/idatt2001/group_30/paths/controller/Controller.java

...001/group_30/paths/controller/CreatePlayerController.java

...u/idatt2001/group_30/paths/controller/HelpController.java

...u/idatt2001/group_30/paths/controller/HomeController.java

...datt2001/group_30/paths/controller/NewGameController.java

...att2001/group_30/paths/controller/NewStoryController.java

...2001/group_30/paths/controller/PlaythroughController.java

...tnu/idatt2001/group_30/paths/controller/StageManager.java

...t2001/group_30/paths/exceptions/CorruptFileException.java

...t2001/group_30/paths/exceptions/CorruptLinkException.java

...001/group_30/paths/exceptions/InvalidButtonException.java

.../group_30/paths/exceptions/InvalidExtensionException.java

...in/java/edu/ntnu/idatt2001/group_30/paths/model/Game.java

...in/java/edu/ntnu/idatt2001/group_30/paths/model/Link.java