Added firstVersionRun & lastRunVersion.

[ADDED]     firstVersionRun: YES if this is the first time the app is running for the current version.
[ADDED]     lastRunVersion: The version that the user was running the last time he used the app.

Pearl/PearlConfig.h

@@ -57,6 +57,8 @@ extern NSString *const PearlConfigChangedNotification;
 @property(nonatomic, readwrite, retain) NSString *version;
 @property(nonatomic, readwrite, retain) NSString *copyright;
 @property(nonatomic, readwrite, retain) NSNumber *firstRun;
+@property(nonatomic, readonly) BOOL firstVersionRun;
+@property(nonatomic, readwrite, retain) NSString *lastRunVersion;
 @property(nonatomic, readwrite, retain) NSNumber *launchCount;
 @property(nonatomic, readwrite, retain) NSNumber *askForReviews;
 @property(nonatomic, readwrite, retain) NSNumber *reviewAfterLaunches;

Pearl/PearlConfig.m

@@ -41,7 +41,7 @@ @implementation PearlConfig {
     unsigned *_gameRandomCounters;
 }
 
-@dynamic build, version, copyright, firstRun, launchCount, askForReviews, reviewAfterLaunches, reviewInApp, reviewedVersion, iTunesID;
+@dynamic build, version, copyright, firstRun, lastRunVersion, launchCount, askForReviews, reviewAfterLaunches, reviewInApp, reviewedVersion, iTunesID;
 @dynamic supportedNotifications, deviceToken;
 @dynamic fontSize, largeFontSize, smallFontSize, fontName, fixedFontName, symbolicFontName;
 @dynamic shadeColor, transitionDuration;
@@ -65,6 +65,7 @@ - (id)init {
             NSStringFromSelector( @selector(version) )             : @"",
             NSStringFromSelector( @selector(copyright) )           : @"",
             NSStringFromSelector( @selector(firstRun) )            : @YES,
+            NSStringFromSelector( @selector(lastRunVersion) )      : @"",
             NSStringFromSelector( @selector(launchCount) )         : @0,
             NSStringFromSelector( @selector(askForReviews) )       : @NO,
             NSStringFromSelector( @selector(reviewAfterLaunches) ) : @10,
@@ -112,6 +113,7 @@ - (id)init {
 #endif
     [[NSNotificationCenter defaultCenter] addObserverForName:notification object:nil queue:nil usingBlock:^(NSNotification *note) {
         self.firstRun = @NO;
+        self.lastRunVersion = [PearlInfoPlist get].CFBundleVersion;
         [[self class] flush];
     }];
 #if TARGET_OS_IPHONE
@@ -121,6 +123,7 @@ - (id)init {
 #endif
     [[NSNotificationCenter defaultCenter] addObserverForName:notification object:nil queue:nil usingBlock:^(NSNotification *note) {
         self.firstRun = @NO;
+        self.lastRunVersion = [PearlInfoPlist get].CFBundleVersion;
         [[self class] flush];
     }];
 
@@ -204,6 +207,10 @@ - (void)forwardInvocation:(NSInvocation *)anInvocation {
 }
 
 
+- (BOOL)firstVersionRun {
+    return ![self.lastRunVersion isEqualToString:[PearlInfoPlist get].CFBundleVersion];
+}
+
 #pragma mark Audio
 
 - (NSString *)firstTrack {