Fixed the pod spec

Hi Jesse

I added JCTiledScrollView to my podspec file but Cocoapods said it could not find the repository. Then I tried to 'pod lib lint', it said the podspec had errors. So I forked it and corrected the errors. I pushed the podspec, but it's currently downloading from my fork
https://github.com/yichizhang/JCTiledScrollView.git

If you accept the pull request and create a release, I can update the podspec and make it point to
https://github.com/jessedc/JCTiledScrollView.git