Add language files

	- Add: language files
	- Add: fieldset for settings of Site View
	- Fix: submenus in Admin panel
Add some configs to admin panel

	- Add: Visibility Breadcrumps
	- Add: Visibility Back button in album
	- Fix: Language constants in fron-end side
Some fixes in styles
Add option for displaying title on gallery pages
Add covers on menu items
Merge pull request #2 from ftp27/develop

Develop