Prepare 4.8.1 release

Author: linev

changes.md

@@ -1,7 +1,7 @@
 # JSROOT changelog
 
 
-## Changes in 4.8.x
+## Changes in 4.8.1
 1. Support new JSON format, produced with newest TBufferJSON
    - object references stored as {"$ref":12}
    - pair objects for std::map marked with "$pair" : "pair<type1,type2>" data memeber

scripts/JSRootCore.js

@@ -92,7 +92,7 @@
    }
 } (function(JSROOT) {
 
-   JSROOT.version = "4.8.x 13/12/2016";
+   JSROOT.version = "4.8.1 13/12/2016";
 
    JSROOT.source_dir = "";
    JSROOT.source_min = false;