Move to 3.0 as next version due to progress made on webgl 2 support

dist/preview release/what's new.md

@@ -3,7 +3,7 @@
 ## Core engine
 
 ### Major updates
- - WebGL2 context support.WebGL2 is initialized instead of WebGL 1 when available ([deltakosh](https://github.com/deltakosh))
+ - WebGL2 context support. WebGL2 is now used instead of WebGL 1 when available. [More info here](http://doc.babylonjs.com/overviews/webgl2) ([deltakosh](https://github.com/deltakosh))
  - Support for [Vertex Array Objects](https://www.opengl.org/registry/specs/ARB/vertex_array_object.txt) ([deltakosh](https://github.com/deltakosh))
  - Support for multisample render targets. [Demo](http://www.babylonjs-playground.com/#12MKMN) ([deltakosh](https://github.com/deltakosh))
  - New Unity 5 Editor Toolkit. Complete pipeline integration [Doc](TODO) - ([MackeyK24](https://github.com/MackeyK24))

readme.md

@@ -15,7 +15,7 @@ Getting started? Play directly with the Babylon.js API via our [playground](http
 
 ## Preview release
 You can help by testing or contributing to the next version.
-- **2.6-alpha** can be found [here](https://github.com/BabylonJS/Babylon.js/tree/master/dist/preview%20release)
+- **3.0-alpha** can be found [here](https://github.com/BabylonJS/Babylon.js/tree/master/dist/preview%20release)
 - We are not complicated people, but we still have some [coding guidelines](http://doc.babylonjs.com/generals/Approved_Naming_Conventions)
 - Before submitting your PR, just check that everything goes well by [creating the minified version](http://doc.babylonjs.com/generals/Creating_the_Mini-fied_Version)
 - Need help contributing, here are some links:

src/babylon.engine.ts

@@ -408,7 +408,7 @@
         }
 
         public static get Version(): string {
-            return "2.6-alpha";
+            return "3.0-alpha";
         }
 
         // Updatable statics so stick with vars here