license updated

https://github.com/thibaud-rohmer/PhotoShow/issues/260

README.md

@@ -320,7 +320,7 @@ CMS are a practical way to setup a website with many features. CMS often come wi
   * [phog](https://github.com/hillman/phog) - Static photo gallery generator with S3 uploader `Python`
   * [Photofloat](http://blog.zx2c4.com/567) - A Web 2.0 Photo Gallery Done Right via Static JSON & Dynamic Javascript ([Demo](http://photos.jasondonenfeld.com/)) `Javascript` `GPLv2`
   * [PhotoLight](https://github.com/thibaud-rohmer/PhotoLight) - The easiest photo gallery there is `PHP`
-  * [Photoshow](http://www.photoshow-gallery.com/) - ([Source code](https://github.com/thibaud-rohmer/PhotoShow)) `Javascript`
+  * [Photoshow](http://www.photoshow-gallery.com/) - ([Source code](https://github.com/thibaud-rohmer/PhotoShow)) `Javascript` `GPLv3`
   * [Piwigo](http://piwigo.org/) - Photo gallery software for the web, built by an active community of users and developers. - `PHP` `GPLv2`
   * [Pygmyfoto](https://github.com/dmpop/pygmyfoto) - A crude solution for publishing a photo roll on the web `PHP` 
   * [Shot.io](http://shot.io/) - Mobile optimised photo publishing platform (self-hosted Flickr alternative) ([Source code](https://github.com/AliasIO/Shot.io)) `PHP` `GPLv3`