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- (UIImage*)thumbnailImage:(NSString*)fileName:(BOOL)includeInCache
{
	NSString *extension=@"png";
	
	if(hasRetinaDisplay)
	{
		NSString *newFileName=[fileName stringByAppendingString:@"@2x"];
		newFileName=[newFileName stringByAppendingFormat:@".%@", extension];
		
		BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:[NSString stringWithFormat:@"%@/%@", [[NSBundle mainBundle] resourcePath], newFileName]];
		
		if(fileExists)
			fileName=[fileName stringByAppendingString:@"@2x"];
	}
	
	fileName=[fileName stringByAppendingFormat:@".%@", extension]; 
	
	UIImage *thumbnail = nil;
	
	if(includeInCache)
		thumbnail=[thumbnailCache objectForKey:fileName];
	
	if (thumbnail == nil)
	{
		NSString *thumbnailFile = [NSString stringWithFormat:@"%@/%@", [[NSBundle mainBundle] resourcePath], fileName];
		
		BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:thumbnailFile];
		
		if(fileExists)
		{
			thumbnail = [UIImage imageWithContentsOfFile:thumbnailFile];
			
			if(includeInCache)
				[thumbnailCache setObject:thumbnail forKey:fileName];
		}
	}
						  
	return thumbnail;
}