As an FYI
2.3 .d.ts file is now available at DefinitelyTyped
https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/babylonjs
And for all the smart and intelligent programmers, in other words all the Java programmers , the Babylonjs 2.3 Java libraries are available at www.jsweet.org
http://www.jsweet.org/candies-snapshots/
Javadocs here
https://jsweet.org/apidocs/snapshots/org/jsweet/candies/babylonjs--babylon/2.3.0-SNAPSHOT/