Merge branch 'FileHandlingAndreas' into 'master'

.gitignore

src/.idea/.gitignore

src/.idea/checkstyle-idea.xml

src/.idea/misc.xml

src/.idea/modules.xml

src/.idea/vcs.xml

...o/ntnu/idatt1002/demo/controller/AddBudgetController.java

.../ntnu/idatt1002/demo/controller/AddExpenseController.java

...no/ntnu/idatt1002/demo/controller/MainMenuController.java

...va/no/ntnu/idatt1002/demo/controller/SceneController.java

...n/java/no/ntnu/idatt1002/demo/data/Budget/BudgetItem.java

...o/ntnu/idatt1002/demo/data/Budget/FileHandlingBudget.java

...ava/no/ntnu/idatt1002/demo/data/Budget/GeneralBudget.java

...n/java/no/ntnu/idatt1002/demo/data/Economics/Expense.java

...o/ntnu/idatt1002/demo/data/Economics/ExpenseCategory.java

...o/ntnu/idatt1002/demo/data/Economics/ExpenseRegister.java

...a/no/ntnu/idatt1002/demo/data/Economics/FileHandling.java

...in/java/no/ntnu/idatt1002/demo/data/Economics/Income.java

...no/ntnu/idatt1002/demo/data/Economics/IncomeCategory.java

...no/ntnu/idatt1002/demo/data/Economics/IncomeRegister.java