FIX:: fixed Client application class

The class was not seeing some imports from the same package, and some getters and setters for User.java were not written, so I wrote those and fixed the imports

FIX:: fixed packages

Everything now isn't in several subpackages in the Client, Common and Server package anymore, but straight in their respectable packages. Also fixed the package names

BUG FIX: fixed Client Application class not being able to see GetBean method

Don't really know how it got fixed, but resolving the import issues also fixed this bug.

EDIT::changed main class in build.gradle file to Client.Application

---------------
I now only get a bug where the fxmlloader can't see the fxml files, and thus I can't start the application. I get the error message "location not set" although I used fxmlloader.setLocation.

src/Common/main/java/gogreen/common/ApplicationException.java

@@ -1,7 +0,0 @@
-package gogreen.common;
-
-public class ApplicationException extends RuntimeException {
-    public ApplicationException(String message) {
-        super(message);
-    }
-}

src/Common/main/java/gogreen/common/ErrorResponse.java

@@ -1,17 +0,0 @@
-package gogreen.common;
-
-public class ErrorResponse {
-    String message;
-
-    public ErrorResponse(String message) {
-        this.message = message;
-    }
-
-    public String getMessage() {
-        return message;
-    }
-
-    public void setMessage(String message) {
-        this.message = message;
-    }
-}

src/Common/main/java/gogreen/common/UserDTO.java

@@ -1,23 +0,0 @@
-package gogreen.common;
-
-public class UserDTO {
-
-	private Long id;
-    private String name;
-
-    public UserDTO() {
-	}
-
-    public UserDTO(Long id, String name) {
-        this.id = id;
-        this.name = name;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public Long getId() {
-        return id;
-    }
-}