feat(ui-money-mask): allow decimals as strings

* allows decimals as string at MoneyMask

* add tests that covers strings as definition of decimals at MoneyMask

* removing unnecessary code

* moving tests to the correct place

src/global/money/money.js

@@ -26,7 +26,7 @@ function MoneyMaskDirective($locale, $parse, PreFormatters) {
 			if (isNaN(decimals)) {
 				decimals = 2;
 			}
-
+			decimals = parseInt(decimals);
 			var moneyMask = maskFactory(decimals);
 
 			function formatter(value) {
@@ -73,6 +73,7 @@ function MoneyMaskDirective($locale, $parse, PreFormatters) {
 			if (attrs.uiMoneyMask) {
 				scope.$watch(attrs.uiMoneyMask, function(_decimals) {
 					decimals = isNaN(_decimals) ? 2 : _decimals;
+					decimals = parseInt(decimals);
 					moneyMask = maskFactory(decimals);
 
 					parser(ctrl.$viewValue);

src/global/money/money.test.js

@@ -67,6 +67,19 @@ describe('ui-money-mask', function() {
 		expect(model.$viewValue).toBe('$ 3,456.79');
 	}));
 
+	it('shold allow string as definition of decimals', angular.mock.inject(function($rootScope) {
+		var input = TestUtil.compile('<input ng-model="model" ui-money-mask="decimals">', {
+			model: '3456.79',
+			decimals: "2"
+		});
+
+		var model = input.controller('ngModel');
+		expect(model.$viewValue).toBe('$ 3,456.79');
+		$rootScope.decimals = "3";
+		$rootScope.$digest();
+		expect(model.$viewValue).toBe('$ 345.679');
+	}));
+
 	it('should validate minimum value', function() {
 		var input = TestUtil.compile('<input ng-model="model" ui-money-mask min="50">', {
 			model: '3456.79'