Merge pull request #39 from MBKwon/master

fixed a _diskQueue's priority.

Author: shnhrrsn

EGOCache.m

@@ -93,8 +93,8 @@ - (id)initWithCacheDirectory:(NSString*)cacheDirectory {
 		dispatch_set_target_queue(priority, _frozenCacheInfoQueue);
 
 		_diskQueue = dispatch_queue_create("com.enormego.egocache.disk", DISPATCH_QUEUE_CONCURRENT);
-		priority = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0);
-		dispatch_set_target_queue(priority, _cacheInfoQueue);
+		priority = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0);
+		dispatch_set_target_queue(priority, _diskQueue);
 
 
 		_directory = cacheDirectory;