feat(uiMoneyMask): format and parse integer models

* New attr ui-integer-model: convert from and to integer model

It's quite common to store money values as integers: storing money as decimal
will likely lead to rounding errors.

It esentially will divide model value by the number of decimals when formatting
it and perform the equivalent multiplication when parsing it.

* Add a couple of tests

src/global/money/money.js

@@ -64,6 +64,9 @@ function MoneyMaskDirective($locale, $parse) {
 				if (ctrl.$isEmpty(value)) {
 					return value;
 				}
+				if (angular.isDefined(attrs.uiIntegerModel)) {
+						value = value / Math.pow(10, decimals);
+				}
 				var prefix = (angular.isDefined(attrs.uiNegativeNumber) && value < 0) ? '-' : '';
 				var valueToFormat = PreFormatters.prepareNumberToFormatter(value, decimals);
 				if (angular.isDefined(attrs.uiCurrencyAfter)) {
@@ -109,7 +112,15 @@ function MoneyMaskDirective($locale, $parse) {
 					ctrl.$render();
 				}
 
-				return formatedValue ? parseInt(formatedValue.replace(/[^\d\-]+/g,''))/Math.pow(10,decimals) : null;
+				var retValue = parseInt(formatedValue.replace(/[^\d\-]+/g,''));
+				if (!isNaN(retValue)) {
+						if (!angular.isDefined(attrs.uiIntegerModel)) {
+								retValue = retValue / Math.pow(10, decimals);
+						}
+						return retValue;
+				} else {
+						return null;
+				}
 			}
 
 			ctrl.$formatters.push(formatter);

src/global/money/money.test.js

@@ -269,4 +269,22 @@ describe('ui-money-mask', function() {
 		var model = input.controller('ngModel');
 		expect(model.$viewValue).toBe('345.00 EUR');
 	});
+
+	it('should format integer models', function() {
+		var input = TestUtil.compile('<input ng-model="model" ui-money-mask ui-integer-model>', {
+				model: 12345
+		});
+
+		var model = input.controller('ngModel');
+		expect(model.$viewValue).toBe('$ 123.45');
+	});
+
+	it('should parse integer models', function() {
+		var input = TestUtil.compile('<input ng-model="model" ui-money-mask ui-integer-model>', {});
+		var model = input.controller('ngModel');
+
+		input.val('123.45').triggerHandler('input');
+		expect(model.$viewValue).toBe('$ 123.45');
+		expect(model.$modelValue).toBe(12345);
+	});
 });