Make full example modules (issue #20)

This version introduces multiple enhancements:

added some examples with templates, logic and translations about display content
added style to change background for pre element

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

Added:      /BLUE_FRAMEWORK/modules/example_generate/elements/css/css.css
            -- Added --
                changed styles for pre element (background and border color)

Modified:   /BLUE_FRAMEWORK/modules/example_generate/layouts/index.html
            -- Added --
                example markers

Modified:   /BLUE_FRAMEWORK/modules/example_generate/example_generate.php
            -- Added --
                _optionalMarker
                _loopMarker
                _loopMarkerEmpty
                _nestedLoopMarker
            -- Updated --
                run to start new example methods and add new css for examples

Modified:   /BLUE_FRAMEWORK/modules/example_generate/lang/example_generate_en-GB.php
            -- Added --
                new english translations for examples

Modified:   /BLUE_FRAMEWORK/modules/example_generate/lang/example_generate_pl-PL.php
            -- Added --
                new polish translations for examples