v3.0.4

= 3.0.4 =
* fixed : minor css correction on responsive thumbnail hover effect
* fixed : minor syntaxic issue on comment title (printf)
* fixed : translation domain was wrong for social networks
* fixed : slider arrows where still showing if slides where deleted but
not slider. Added a check if slides have attachment.
* improved : image galleries : if fancybox active, lightbox navigation
is now enabled
* improved : better capability control of edit page button. Only appears
if user_can edit_pages (like for posts)
* added : Activation welcome screen
* added : new action in admin_init hook to load the meta boxes class