updated upload page to generate vbox from a list

src/main/java/NTNU/IDATT1002/controllers/DataExchange.java

src/main/java/NTNU/IDATT1002/controllers/Explore.java

src/main/java/NTNU/IDATT1002/controllers/ExploreAlbums.java

src/main/java/NTNU/IDATT1002/controllers/Login.java

src/main/java/NTNU/IDATT1002/controllers/Main.java

src/main/java/NTNU/IDATT1002/controllers/Map.java

src/main/java/NTNU/IDATT1002/controllers/Search.java

src/main/java/NTNU/IDATT1002/controllers/SignUp.java

src/main/java/NTNU/IDATT1002/controllers/Upload.java

...ain/java/NTNU/IDATT1002/controllers/UploadedMultiple.java

src/main/java/NTNU/IDATT1002/controllers/UploadedSingle.java

src/main/java/NTNU/IDATT1002/controllers/ViewAlbum.java

src/main/java/NTNU/IDATT1002/controllers/ViewPicture.java

src/main/resources/NTNU/IDATT1002/explore.fxml