Remove references to GameMath, it's just Math now

Throw exceptions if wrong format given to tilemap or textureatlas. Previously, old onload remained active and error happened in the wrong (and hard to diagnose) place.

src/core/Game.js

@@ -138,7 +138,7 @@ Phaser.Game = function (width, height, renderer, parent, state, transparent, ant
     this.load = null;
 
     /**
-	* @property {Phaser.GameMath} math - Reference to the math helper.
+	* @property {Phaser.Math} math - Reference to the math helper.
 	* @default
 	*/
     this.math = null;

src/core/State.js

@@ -50,7 +50,7 @@ Phaser.State = function () {
     this.load = null;
     
     /**
-	* @property {Phaser.GameMath} math - Reference to the math helper.
+	* @property {Phaser.Math} math - Reference to the math helper.
 	* @default
 	*/
     this.math = null;

src/loader/Loader.js

@@ -744,6 +744,10 @@ Phaser.Loader.prototype = {
 						return _this.csvLoadComplete(file.key);
 					};
 				}
+				else
+				{
+					throw new Error("Phaser.Loader. Invalid Tilemap format: " + file.format);
+				}
 
 				this._xhr.onerror = function () {
 					return _this.dataLoadError(file.key);
@@ -873,6 +877,10 @@ Phaser.Loader.prototype = {
 							return _this.xmlLoadComplete(file.key);
 						};
 					}
+					else
+					{
+						throw new Error("Phaser.Loader. Invalid Texture Atlas format: " + file.format);
+					}
 
 					this._xhr.onerror = function () {
 						return _this.dataLoadError(file.key);
@@ -1105,4 +1113,4 @@ Phaser.Loader.prototype = {
 
 	}
 
-};
+};

src/math/Math.js

@@ -350,7 +350,7 @@ Phaser.Math = {
 
         if (typeof radians === "undefined") { radians = true; }
 
-        var rd = (radians) ? GameMath.PI : 180;
+        var rd = (radians) ? Math.PI : 180;
         return this.wrap(angle, rd, -rd);
         
     },