ARC changes
Design changes (including no date)
Made the delegate method that checks wether the data source is loading optional do to redundancy
No need for the delegate method to be optional, so it is now gone. Just using states from inside the class is enough since there is no case where the class is in loading state and the quotes are not loading.
Added function to show loading header which is called when you drag the right amount or when you call it when the quotes view loads
Ptr now notifies delegate that it has pulled enough to show refresh, and the delegate then has the choice of actually showing the loading header or not by calling egoRefreshScrollViewShouldShowLoading
Removed useless dealloc
egoRefreshScrollViewDidEndDragging: shows the animation once more