If ListView has top padding, refresh state is never entered

[bensandee]

Great library, thank you!

I ran into this issue, but sorry I don't have a patch:

If the RefreshableListView has a top padding, the getChildAt(0).getTop() returns non-zero and many of the assumptions made in the touch logic start to fail. I started to try to normalize it, but the truth is I don't really understand the code well enough to fix it do the job correctly.

My padding was actually not necessary (and was an accident), but I thought I would mention this for anyone else that might run into this.