Merge branch 'develop' into prototype/Swift_3_2

# Conflicts:
#	CoreStoreDemo/CoreStoreDemo/List and Object Observers Demo/Palette.swift
#	Sources/Value.swift

Sources/AsynchronousDataTransaction.swift

@@ -210,6 +210,7 @@ public final class AsynchronousDataTransaction: BaseDataTransaction {
             group.leave()
         }
         group.wait()
+        self.context.reset()
     }