Fixes a few issues with the scrubber calculating it's position. This works with all combinations of hidden or shown status bar, navigation bar, tab bar, and so on.

This updates the title much sooner, as soon as we hit the section header, instead of waiting until we hit the first item row. So far it seems to work fine and avoid the misnamed section issue for the scrubber.

Doing more testing and checking the code some more. Feedback is always appreciated before merging.

Issues here

    /**
     Initial dragging doesn't take in account collection view headers, just cells, so before the scrubber reaches
     a cell, this is not going to return an index path.
     **/
    private func indexPath(at point: CGPoint) -> NSIndexPath? {
        guard let collectionView = self.collectionView else { return nil }
        if let indexPath = collectionView.indexPathForItemAtPoint(point) {
            return indexPath
        }
        for indexPath in collectionView.indexPathsForVisibleSupplementaryElementsOfKind(UICollectionElementKindSectionHeader) {
            let view = collectionView.supplementaryViewForElementKind(UICollectionElementKindSectionHeader, atIndexPath: indexPath)
            if view!.frame.contains(point) {
                return indexPath
            }
        }
        return nil
    }

• Increases amount of sections
• Increases the height of the section headers and centers their labels
• Remove local photos related code
• Refactors titleForSection to have a more Swift 3 kind of API
• Remove additional newlines to make code formatting more consistent
• Remove attribution header from UILabel extension

Just a small pull request to check if I'm going in the right direction.

Mostly wandering as to what things should be generically specified in the DateScrubber and what things should be customizable in the client.

Let me know what you think, in the meantime I continue with moving the collectionview according to the DateScrubber position.

To reproduce:

1. Use the dateScrubber to scrub over the collectionView so the sectionLabel appears
2. Release the date scrubber
3. Scroll the collectionView
4. The sectionLabel stays visible while scrolling the collectionView, while it should disappear 3 seconds after releasing the dateScrubber

The scrubber appears and moves along when scrolling through the collection view, and disappears when there's no interaction for 3 seconds.

The sectionLabel fades in and moves a bit to the left when the scrubber is pressed to "scrub" through the collection view. When the scrubber is released the label moves back to the right. And fades out after 3 seconds.

• There is one bug where I hide the sectionlabel after a 3 second delay (with performSelector: withObject: afterDelay:) But when I scroll the collectionView during that time, it only hides it after I stop that 🤔
• So scrolling the collectionview activates the scrubber and using a gesture on the scrubber activates the section label. I implemented some logic to keep track of when to hide and show them, but I'm wondering if I could be more clear. It can be a bit confusing now. Any tips are welcome!

The sectionScrubber itself can recognise when the scrubber has scrolled to the top of the bottom, but only the collectionViewController itself knows what title's should be displayed in this case.

I used the datasoure to request the titles, but any suggestion on solving this more elegantly is welcome!

Explain the functionality of the SectionScrubberDelegate. Not sure how to point out that all the methods are optional in the best way :v:

Also have trouble showing the gif all of a sudden, it was working before but not anymore! Anyone has a clue as to why this might be?

• Show an overlay when the section scrubber is being scrubbed
• Change the time for hiding the element to 2 seconds
• fix some small bugs/add some safety state checks for hiding the elements
• try to fix bug where the section scrubber doesn't go all the way to the bottom [WIP]