Update README URLs based on HTTP redirects (vsouza#1117)

README.md

@@ -1574,7 +1574,7 @@ Most of these are paid services, some have free tiers.
 * [YXTPageView](https://github.com/hanton/YXTPageView) - A PageView, which supporting scrolling to transition between a UIView and a UITableView.
 * [DZNEmptyDataSet](https://github.com/dzenbot/DZNEmptyDataSet) - A drop-in UITableView/UICollectionView superclass category for showing empty datasets whenever the view has no content to display.
 * [ConfigurableTableViewController](https://github.com/fastred/ConfigurableTableViewController) - Typed, yet Flexible Table View Controller http://holko.pl/2016/01/05/typed-table-view-controller/ :large_orange_diamond:
-* [CSStickyHeaderFlowLayout](https://github.com/jamztang/CSStickyHeaderFlowLayout) - UICollectionView replacement of UITableView. Do even more like Parallax Header, Sticky Section Header. :large_orange_diamond:
+* [CSStickyHeaderFlowLayout](https://github.com/CSStickyHeaderFlowLayout/CSStickyHeaderFlowLayout) - UICollectionView replacement of UITableView. Do even more like Parallax Header, Sticky Section Header. :large_orange_diamond:
 * [folding-cell](https://github.com/Ramotion/folding-cell) - TableViewCell replacement with parallax detail view for Swift :large_orange_diamond:
 * [Lightning-Table](https://github.com/electrickangaroo/Lightning-Table) - A declarative api for working with UITableView.
 * [Static](https://github.com/venmo/Static) - Simple static table views for iOS in Swift. :large_orange_diamond:
@@ -1744,7 +1744,7 @@ Most of these are paid services, some have free tiers.
 #### GCD
  * [GCDKit](https://github.com/JohnEstropia/GCDKit) - Grand Central Dispatch simplified with Swift. :large_orange_diamond:
  * [Async](https://github.com/duemunk/Async) - Syntactic sugar in Swift for asynchronous dispatches in Grand Central Dispatch :large_orange_diamond:
- * [SwiftSafe](https://github.com/czechboy0/SwiftSafe) - Thread synchronization made easy :large_orange_diamond:
+ * [SwiftSafe](https://github.com/nodes-ios/SwiftSafe) - Thread synchronization made easy :large_orange_diamond:
  * [YYDispatchQueuePool](https://github.com/ibireme/YYDispatchQueuePool) - iOS utility class to manage global dispatch queue.
  * [AlecrimAsyncKit](https://github.com/Alecrim/AlecrimAsyncKit) - Bringing async and await to Swift world with some flavouring. :large_orange_diamond:
  * [GrandSugarDispatch](https://github.com/jessesquires/GrandSugarDispatch) - Syntactic sugar for Grand Central Dispatch (GCD) :large_orange_diamond: