Request type detection

[y-lohse]

Hi,
i encountered a small problem, not sure if it could be considered a bug.

I'm doing my upload with a POST request — as in, the HTTP header is set to post and the resumable data is in the POST body.
However, the URL I'm sending the POST request to has a GET param as well, ie. ``htttp://localhost/upload?token=lol`. Because of that, the SimpleRequest class in Resumable.php thinks it's a GET request, tried to load the params from GET and fails.

I think it would make sense to change the code here to use the HTTP header to detect the type of request rather than the ìsset() call. What do you think? I can probably submit a PR if that's ok for you.

[dilab]

I think your point is valid.

a PR is always welcomed. :)