message: rename APP_REL to APP_BLD
diff: @@ -62,7 +62,7 @@ if ( NODEJS ) {
  var PptxGenJS = function(){
  // APP
  var APP_VER = "2.2.0-beta";
  - var APP_REL = "20180417";
  + var APP_BLD = "20180417";
  // CONSTANTS
  var MASTER_OBJECTS = {
  @@ -4294,7 +4294,7 @@ var PptxGenJS = function(){
  /**
  * Library version
  */
  - this.version = APP_VER +'.'+ APP_REL;
  + this.version = APP_VER +'.'+ APP_BLD;
  /**
  * Expose a couple private helper functions from above
  