Change default framework view (issue #17)

This version introduces multiple enhancements:

added language selection and github project link

Details of additions/deletions below:
--------------------------------------------------------------

Added:      /elementy/examples/Poland.png
Added:      /elementy/examples/United-Kingdom.png

Modified:   /BLUE_FRAMEWORK/elements/layouts/examples/header.html
            -- Added --
                button with language selection
                github project link
            -- Removed --
                button with login form
Modified:   /BLUE_FRAMEWORK/cfg/lang/core_en-GB.php
            -- Added --
                translations for language select

Modified:   /BLUE_FRAMEWORK/cfg/lang/core_pl-PL.php
            -- Added --
                translations for language select

Modified:   /BLUE_FRAMEWORK/elements/css/styles.css
            -- Updated --
                changed breadcrumbs width

Modified:   /BLUE_FRAMEWORK/modules/main/main.php
            -- Updated --
                run to handle language selection url and fixed problem with language code in breadcrumbs url