minor fixes

CoreStore/Internal/NSManagedObjectModel+Setup.swift

@@ -65,10 +65,13 @@ internal extension NSManagedObjectModel {
         }
         else if let resolvedVersion = modelVersions.first ?? modelVersionHints.first {
             
-            CoreStore.log(
-                .Warning,
-                message: "The MigrationChain leaf versions do not include any of the model file's embedded versions. Resolving to version \"\(resolvedVersion)\"."
-            )
+            if !modelVersionHints.isEmpty {
+                
+                CoreStore.log(
+                    .Warning,
+                    message: "The MigrationChain leaf versions do not include any of the model file's embedded versions. Resolving to version \"\(resolvedVersion)\"."
+                )
+            }
             currentModelVersion = resolvedVersion
         }
         else {

CoreStore/Observing/ListObserver.swift

@@ -205,7 +205,6 @@ public protocol ListSectionObserver: ListObjectObserver {
     - parameter sectionInfo: the `NSFetchedResultsSectionInfo` for the inserted section
     - parameter sectionIndex: the new section index for the new section
      */
-    @available(iOS 8.0, *)
     func listMonitor(monitor: ListMonitor<ListEntityType>, didInsertSection sectionInfo: NSFetchedResultsSectionInfo, toSectionIndex sectionIndex: Int)
     
     /**
@@ -215,7 +214,6 @@ public protocol ListSectionObserver: ListObjectObserver {
     - parameter sectionInfo: the `NSFetchedResultsSectionInfo` for the deleted section
     - parameter sectionIndex: the previous section index for the deleted section
      */
-    @available(iOS 8.0, *)
     func listMonitor(monitor: ListMonitor<ListEntityType>, didDeleteSection sectionInfo: NSFetchedResultsSectionInfo, fromSectionIndex sectionIndex: Int)
 }