Minor Style changes.

[IagoLast]

Use evalAsync instead safeApply

• safeApply is a common code snippet in angular projects however it´s a bad practice angular $evalAsync should be used instead.

https://docs.angularjs.org/api/ng/type/$rootScope.Scope#$evalAsync

Code makeup

• Use angular.isFunction instead javascript typeof.
• Code makeup according to a commonly used style guide.

https://github.com/johnpapa/angular-styleguide/blob/master/a1/README.md

[chenkie]

Thanks for your PR :)