[TYPO3-mvc] Create link to file resource with fluid

[Steffen Kamper]

btw - i checked the viewhelper from Anja . It works fine with the link wizard syntax. But if you define class in template using multiple classes like
class="class1 class2 class3" it breaks and renders wrong.
I also added for myself the possibilities to use ATagParams.

So i can use this viewhelper with the most used features needed.