Removes the player functions from the rootScope.

However, saving track's position is broken.
Some are still there because of problems I don't know how to solve, e.g. circular dependency between notifications and player.
Uses the queue controller for the sidebar queue.
Moves loadTrackPosition to the main controller.

app/queue/queue_test.js

@@ -0,0 +1,30 @@
+describe("Queue controller", function() {
+    'use strict';
+
+    var player, scope;
+
+    beforeEach(function() {
+        module('jamstash.queue.ctrl');
+
+        inject(function ($controller, $rootScope, _player_) {
+            scope = $rootScope.$new();
+            player = _player_;
+
+            // Mock the functions of the services
+            spyOn(player, "playSong").and.stub();
+
+            $controller('PlayerCtrl', {
+                $scope: scope,
+                player: player
+            });
+        });
+
+        it("When I call playSong, it calls playSong in the player service", function() {
+            var fakeSong = {"id": 3174};
+
+            scope.playSong(true, fakeSong);
+
+            expect(player.playSong).toHaveBeenCalledWith(true, fakeSong);
+        });
+    });
+});