Continue fixing build errors.

Evergreen/ArticleStyles/ArticleStylesManager.swift

@@ -66,7 +66,7 @@ public final class ArticleStylesManager {
 		updateStyleNames()
 		updateCurrentStyle()
 
-		NotificationCenter.default.addObserver(self, selector: #selector(applicationDidBecomeActive(_:)), name: NSNotification.Name.NSApplicationDidBecomeActiveNotification, object: nil)
+		NotificationCenter.default.addObserver(self, selector: #selector(applicationDidBecomeActive(_:)), name: NSApplication.didBecomeActiveNotification, object: nil)
 	}
 
 	// MARK: Notifications

Evergreen/MainWindow/AddFeed/AddFeedController.swift

@@ -63,7 +63,7 @@ class AddFeedController: AddFeedWindowControllerDelegate, FeedFinderDelegate {
 		assert(folder.account != nil, "Folder must have an account.")
 		let account = folder.account ?? AccountManager.sharedInstance.localAccount
 
-		if account.hasFeedWithURLString(url.absoluteString) {
+		if account.hasFeed(withURL: url.absoluteString) {
 			showAlreadySubscribedError(url.absoluteString, folder)
 			return
 		}
@@ -160,7 +160,7 @@ private extension AddFeedController {
 			return
 		}
 
-		if account.hasFeedWithURLString(feedURLString) {
+		if account.hasFeed(withURL: feedURLString) {
 			showAlreadySubscribedError(feedURLString, folder)
 			return
 		}

Evergreen/MainWindow/AddFolder/AddFolderWindowController.swift

@@ -68,7 +68,7 @@ class AddFolderWindowController : NSWindowController {
 			return
 		}
 		
-		let _ = account.ensureFolderWithName(folderName)
+		let _ = account.ensureFolder(with: folderName)
 	}
 	
 	// MARK: Actions

Frameworks/Account/Account.swift

@@ -70,6 +70,11 @@ public final class Account: DisplayNameProvider, Hashable {
 		// TODO
 	}
 	
+	public func ensureFolder(with name: String) -> Folder? {
+		
+		return nil //TODO
+	}
+	
 	// MARK: - Equatable
 
 	public class func ==(lhs: Account, rhs: Account) -> Bool {

Frameworks/Account/Container/Container.swift

@@ -24,6 +24,7 @@ public protocol Container {
 	func flattenedFeeds() -> Set<Feed>
 	func existingFeed(with feedID: String) -> Feed?
 	func existingFeed(withURL url: String) -> Feed?
+	func hasFeed(withURL url: String) -> Bool
 	
 	func isChild(_ obj: AnyObject) -> Bool
 
@@ -64,6 +65,14 @@ public extension Container {
 		return foundObject as! Feed?
 	}
 	
+	func hasFeed(withURL url: String) -> Bool {
+	
+		if let _ = existingFeed(withURL: url) {
+			return true
+		}
+		return false
+	}
+	
 	func visitChildren(visitBlock: VisitBlock) -> Bool {
 		
 		return visitObjects(false, visitBlock)