added lesson 7

src/Lesson7/LoggingFactory.sc

@@ -0,0 +1,16 @@
+trait Logged {
+  def log(msg: String)
+}
+
+trait ConsoleLogger extends Logged {
+  override def log(msg: String) = println("[LOG] " + msg)
+}
+
+abstract class Person(name: String)
+
+class Customer(n: String) extends Person(n) with Logged {
+  log(s"Person $n created")
+}
+
+val a = new Customer("Patrick Jane") with ConsoleLogger
+