Changed capitalization to conform to Java conventions. Why must OSX b…

…e case-insensitive by default?

src/Controller/Controller.java → src/controller/Controller.java

@@ -1,5 +1,5 @@
-package Controller;
-
-public class Controller {
-
-}
+package controller;
+
+public class Controller {
+
+}

src/gui/Gui.java

@@ -0,0 +1,5 @@
+package gui;
+
+public class Gui {
+
+}

src/model/Model.java

@@ -0,0 +1,5 @@
+package model;
+
+public class Model {
+
+}