Fix gulp doc

Tools/Gulp/readme.md

@@ -41,11 +41,6 @@ Will be generated :
 - babylon.noworker.js (minified version without collisions workers)
 - babylon.max.js (unminified)
 
-### Build Babylon.js when you save a javascript file:
-```
-gulp watch
-```
-
 ## From the typescript source
 ### Build Babylon.js from the typescript files:
 
@@ -62,12 +57,35 @@ Be aware that all js files content will be overwrite.
 
 ### Build Babylon.js when you save a typescript file:
 ```
-gulp watch-typescript
+gulp watch
+```
+
+### Run Integrated Web Server and watch for changes:
+```
+gulp run
 ```
 
+you can now freely test in the following URLs:
+- [Playground]("http://localhost:1338/Playground/index-local.html")
+- [Materials Library]("http://localhost:1338/materialsLibrary/index.html")
+- [Postprocess Library]("http://localhost:1338/postProcessLibrary/index.html")
+- [Procedural Textures Library]("http://localhost:1338/proceduralTexturesLibrary/index.html")
+- [Local Dev Samples]("http://localhost:1338/localDev/index.html")
+
 ### Compile all the typscript files to their javascript respective files including declaration file
 ```
 gulp typescript-compile
 ```
 
 Be aware that all js files content will be overwritten.
+
+### Compile all the libraries
+```
+gulp typescript-libraries
+```
+
+Be aware that all js files content will be overwritten.
+
+### Compile all the typscript and the library
+```
+gulp typescript-all