Added cs\Language\Prefix class

System version 0.369
modules:
Blogs 0.068
Comments 0.020
Cron 0.008
Disqus 1.0.1+build-2
Feedback 0.006
HybridAuth 2.1.1-cs30
OAuth2 0.028
Photo_gallery 0.015
Plupload 2.0.0-cs2
Static_pages 0.036
plugins:
Admin_default_theme 0.005
Fotorama 4.4.6-cs1
SimpleImage 2.3-cs1
TinyMCE 4.0.9-cs3