Added initial class skeletons

lib/Class.js

@@ -0,0 +1,41 @@
+'use strict';
+
+class Class {
+	classId;
+	subjectId;
+	name;
+
+	get subject() {
+
+	}
+
+	get tests() {
+
+	}
+
+	get teachers() {
+
+	}
+
+	get students() {
+
+	}
+
+	addTeacher() {
+
+	}
+
+	removeTeacher() {
+
+	}
+
+	calculateAverageMovement() {
+
+	}
+
+	static createClass() {
+
+	}
+}
+
+module.exports =  Class;