Merge pull request #156 from gwenael-hagenmuller/ourOwnBabylonJS

ArcRotateCamera, Mesh and Vector3 new methods / Fixes
Fixing csg
Merge branch 'master' of https://github.com/BabylonJS/Babylon.js
Adding invertY to videoTexture
Merge branch 'master' of https://github.com/BabylonJS/Babylon.js

Conflicts:
	babylon.1.9.0.js
setActiveCameraById
setActiveCameraByName
Added Cheetah3d exporter
Variable 'result' should be defined in strict mode
Merge pull request #158 from Temechon/patch-2

Variable should be declared in strict mode
Merge pull request #157 from Calebsem/master

Added Cheetah3d exporter
Merge pull request #1 from BabylonJS/master

test sync
Add Gulp for buiding babylon cross platform

Gulp.js is a succesfful build system based on nodejs.
Easy to use and easy to configure. Plus it's cross-platform.
Add name option for gulp-shaders
Del useless params utf8 in gulp-shader
Update readme.md
Merge pull request #159 from SideraX/master

Add Gulp for buiding babylon cross platform
Blender Exporter : corrected texture wrapping

-> CLIP, REPEAT and MIRROR texture wrapping options in Blender are now correctly interpreted in Babylon
Merge pull request #160 from vousk/master

Blender exporter corrected - texture wrapping
Using the hardware scaling when creating a Ray.
Removed empty space