Fixed importing with a different key and entity access after MOC changes.

[FIXED]   Importing stored content when not logged in with the same key.
[FIXED]   Holding entities is a bad idea when MOCs can change.  Holding ObjectIDs instead now.

MasterPassword/MPAppDelegate_Shared.m

@@ -7,12 +7,16 @@
 //
 
 #import "MPAppDelegate_Shared.h"
+#import "MPAppDelegate_Store.h"
+
+@interface MPAppDelegate_Shared ()
+
+@property (strong) NSManagedObjectID *activeUserID;
+
+@end
 
 @implementation MPAppDelegate_Shared
 
-@synthesize key;
-@synthesize activeUser;
-
 + (MPAppDelegate_Shared *)get {
 
 #if TARGET_OS_IPHONE
@@ -41,4 +45,14 @@
 #endif
 }
 
+- (MPUserEntity *)activeUser {
+
+    return (MPUserEntity *)[self.managedObjectContextIfReady objectWithID:self.activeUserID];
+}
+
+- (void)setActiveUser:(MPUserEntity *)activeUser {
+
+    self.activeUserID = activeUser.objectID;
+}
+
 @end

MasterPassword/MPEntities.m

@@ -185,6 +185,7 @@
     if (!key)
         return;
 
+    assert([key.keyID isEqualToData:self.user.keyID]);
     [self setContent:content usingKey:key];
 }
 
@@ -209,7 +210,7 @@
 - (void)setContent:(id)content usingKey:(MPKey *)key {
 
     assert(self.type & MPElementTypeClassStored);
-    assert([key.keyID isEqualToData:self.user.keyID]);
+    assert(key);
 
     NSData *encryptedContent = [[content description] encryptWithSymmetricKey:[key subKeyOfLength:PearlCryptKeySize].keyData padding:YES];