Calling ReloadData with fresh content doesn't update SYPaginator

[pws5068]

I've fixed this issue in PR #12. It's been dormant for a while so I'm filing an issue to accompany the pull request. Let me know if there is any difficulty reproducing

Steps to reproduce:

• Display an SYPaginator with several pages of images
• Alter the data source, such that -paginatorView:viewForPageAtIndex: will return new pages/content
• Call [paginatorView reloadData]

Expected result

SYPaginator updates to display the new set of pages

Actual result

SYPaginator does not update. viewForPageAtIndex is not called