Create .editorconfig

Proposal of an `.editorconfig` file.
Okey. I do it soon :)

Envoyé de mon iPhone

> Le 23 juil. 2014 à 22:47, Jérôme Tamarelle <notifications@github.com> a écrit :
> 
> In editorconfig:
> 
> > @@ -0,0 +1,10 @@
> > +; top-most EditorConfig file
> > +root = true
> > +
> > +; Unix-style newlines
> > +[*]
> > +end_of_line = LF
> > +
> > +[*.php]
> You can specify this indentation by default for all files extension (js, less, css, json, razr).
> 
> —
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