Increase MAX_ATOMS to handle Alien 4K and others from iTunes store

credit to @benfry
refs: benfry@a66918b

Author: wez

src/AtomicParsley.h

@@ -123,7 +123,7 @@
 
 #include "util.h"
 
-#define MAX_ATOMS 1024
+#define MAX_ATOMS 2048
 #define MAXDATA_PAYLOAD 1256
 #define DEFAULT_PADDING_LENGTH 2048;
 #define MINIMUM_REQUIRED_PADDING_LENGTH 0;