Small simplification

System version 0.350
modules:
Blogs 0.062
Comments 0.019
Cron 0.008
Feedback 0.005
HybridAuth 2.1.1-cs27
OAuth2 0.025
Photo_gallery 0.014
Plupload 1.5.7-cs10
Static_pages 0.036
plugins:
Admin_default_theme 0.005
Fotorama 4.4.3-cs1
SimpleImage 2.3-cs1
TinyMCE 4.0.6-cs1
Large refactoring.
cs\User class splitted on classes:
cs\Group
cs\Permission
cs\User
and one trait:
cs\Permission\Any

Many connected methods were renamed

System version 0.351
modules:
Blogs 0.063
Comments 0.019
Cron 0.008
Feedback 0.005
HybridAuth 2.1.1-cs27
OAuth2 0.025
Photo_gallery 0.014
Plupload 1.5.7-cs10
Static_pages 0.036
plugins:
Admin_default_theme 0.005
Fotorama 4.4.3-cs1
SimpleImage 2.3-cs1
TinyMCE 4.0.6-cs1