added the $maxPerPage and $currentPage params to the constructor

[yjv]

this allows you the instaciate the PagerFanta instance all ready to go if you are already on a different page or you want a different max per page

[stof]

This misses the validation of the values which is applied by setters.

and this is also missing tests covering this API

[Koc]

now checks added. Can we merge? @sampart @stof

[sampart]

@Koc Thanks for this. I can see that you've switched to using the setters which is great, but I think you still need to add tests as @stof mentioned please.