opml parser converts strings to lowercase before starting parsing.

FeedsTableViewController will stop the refresh control from spinning if there are zero feeds, instead of continuously spinning.
FindFeedViewController will actually find feeds/opml files if you directly go to them.
Fixed css loading in ArticleViewController
Fixed css in article.css, won't have to horizontally scroll anymore!
Importing OPMLs will call completion with no feeds if there weren't any retrieved.