merge changes to the main context asynchronously (fixes https://github.com/JohnEstropia/CoreStore/issues/7)

CoreStore.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name = "CoreStore"
-    s.version = "1.0.0"
+    s.version = "1.0.1"
     s.license = "MIT"
     s.summary = "Simple, elegant, and smart Core Data programming with Swift"
     s.homepage = "https://github.com/JohnEstropia/CoreStore"

CoreStore/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0.0</string>
+	<string>1.0.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

CoreStore/Internal/NSManagedObjectContext+Setup.swift

@@ -83,11 +83,10 @@ internal extension NSManagedObjectContext {
             object: rootContext,
             closure: { [weak context] (note) -> Void in
                 
-                context?.performBlockAndWait { () -> Void in
+                context?.performBlock { () -> Void in
                     
                     context?.mergeChangesFromContextDidSaveNotification(note)
                 }
-                return
             }
         )
         

CoreStore/Saving and Processing/AsynchronousDataTransaction.swift

@@ -38,11 +38,11 @@ public final class AsynchronousDataTransaction: BaseDataTransaction {
     // MARK: Public
     
     /**
-    Saves the transaction changes asynchronously. This method should not be used after the `commit()` method was already called once.
+    Saves the transaction changes. This method should not be used after the `commit()` method was already called once.
     
     - parameter completion: the block executed after the save completes. Success or failure is reported by the `SaveResult` argument of the block.
     */
-    public func commit(completion: (result: SaveResult) -> Void) {
+    public func commit(completion: (result: SaveResult) -> Void = { _ in }) {
         
         CoreStore.assert(
             self.transactionQueue.isCurrentExecutionContext(),
@@ -64,24 +64,6 @@ public final class AsynchronousDataTransaction: BaseDataTransaction {
         semaphore.wait()
     }
     
-    /**
-    Saves the transaction changes and waits for completion synchronously. This method should not be used after the `commit()` method was already called once.
-    */
-    public func commit() {
-        
-        CoreStore.assert(
-            self.transactionQueue.isCurrentExecutionContext(),
-            "Attempted to commit a \(typeName(self)) outside its designated queue."
-        )
-        CoreStore.assert(
-            !self.isCommitted,
-            "Attempted to commit a \(typeName(self)) more than once."
-        )
-        
-        self.isCommitted = true
-        self.result = self.context.saveSynchronously()
-    }
-    
     /**
     Begins a child transaction synchronously where NSManagedObject creates, updates, and deletes can be made. This method should not be used after the `commit()` method was already called once.