Make full example modules (issue #20)

This version introduces multiple enhancements:

finihed module with translations example
added some files for sys marks example module

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

Added:      /BLUE_FRAMEWORK/modules/example_core_markers/lang/example_core_markers_en-GB.php
            -- Added --
                english translations

Added:      /BLUE_FRAMEWORK/modules/example_core_markers/lang/example_core_markers_pl-PL.php
            -- Added --
                polish translations

Added:      /BLUE_FRAMEWORK/modules/example_core_markers/layouts/some_directory/template_name.html
            -- Added --
                example template

Added:      /BLUE_FRAMEWORK/modules/example_core_markers/layouts/template_name.html
            -- Added --
                example template

Added:      /BLUE_FRAMEWORK/modules/example_core_markers/layouts/index.html
            -- Added --
                main example template

Added:      /BLUE_FRAMEWORK/modules/example_core_markers/example_core_markers.php
            -- Added --
                system markers module main file

Added:      /BLUE_FRAMEWORK/modules/example_translations/example_translations.php
            -- Added --
                translation module main file

Added:      /BLUE_FRAMEWORK/modules/example_translations/layouts/index.html
            -- Added --
                main example template

Added:      /BLUE_FRAMEWORK/modules/example_translations/lang/example_translations_pl-PL.php
            -- Added --
                polish translations

Added:      /BLUE_FRAMEWORK/modules/example_translations/lang/example_translations_en-GB.php
            -- Added --
                english translations

Modified:   /BLUE_FRAMEWORK/cfg/tree.xml
            -- Added --
                nodes with translation and sys marks examples

Modified:   /BLUE_FRAMEWORK/cfg/lang/core_en-GB.php
            -- Added --
                some translations for examples

Modified:   /BLUE_FRAMEWORK/cfg/lang/core_pl-PL.php
            -- Added --
                some translations for examples

Modified:   /BLUE_FRAMEWORK/elements/layouts/examples/examples.html
            -- Added --
                language markers with translation and sys mark module description