Added Camera.screenToCamera and setAngle methods.

Author: photonstorm

v3/src/camera/2d/Camera.js

@@ -77,6 +77,8 @@ var Camera = new Class({
     ignore: require('./inc/Ignore'),
     preRender: require('./inc/PreRender'),
     removeBounds: require('./inc/RemoveBounds'),
+    screenToCamera: require('./inc/ScreenToCamera'),
+    setAngle: require('./inc/SetAngle'),
     setBackgroundColor: require('./inc/SetBackgroundColor'),
     setBounds: require('./inc/SetBounds'),
     setName: require('./inc/SetName'),

v3/src/camera/2d/inc/ScreenToCamera.js

@@ -0,0 +1,12 @@
+var ScreenToCamera = function (x, y, pointOut)
+{
+    this.matrix.transformPoint(x, y, pointOut);
+
+    //  Add in the scroll offset
+    pointOut.x += this.scrollX;
+    pointOut.y += this.scrollY;
+
+    return pointOut;
+};
+
+module.exports = ScreenToCamera;

v3/src/camera/2d/inc/SetAngle.js

@@ -0,0 +1,12 @@
+var DegToRad = require('../../../math/DegToRad');
+
+var SetAngle = function (value)
+{
+    if (value === undefined) { value = 0; }
+
+    this.rotation = DegToRad(value);
+
+    return this;
+};
+
+module.exports = SetAngle;