Merge branch 'old' into 'testing'

.gitignore

.vscode/settings.json

bin/hellofx/Calculator.class

bin/hellofx/Controller$1.class

bin/hellofx/Controller$10.class

bin/hellofx/Controller$2.class

bin/hellofx/Controller$3.class

bin/hellofx/Controller$4.class

bin/hellofx/Controller$5.class

bin/hellofx/Controller$6.class

bin/hellofx/Controller$7.class

bin/hellofx/Controller$8.class

bin/hellofx/Controller$9.class

bin/hellofx/Controller.class

bin/hellofx/Main.class

bin/hellofx/Value.class

bin/hellofx/hellofx.fxml

src/hellofx/Calculator.java

src/hellofx/Controller.java

src/hellofx/Main.java