Make full example modules (issue #20)

This version introduces multiple enhancements:

finished generate content example
some changes in example layouts
added some base structure for layout example

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

Added:      /BLUE_FRAMEWORK/modules/example_layout/layouts/external/external.html
Added:      /BLUE_FRAMEWORK/modules/example_layout/lang/example_layout_en-GB.php
Added:      /BLUE_FRAMEWORK/modules/example_layout/lang/example_layout_pl-PL.php

Modified:   /BLUE_FRAMEWORK/modules/example_generate/example_generate.php
            -- Added --
                _simpleCoreMarker to show generate content to core template
            -- Updated --
                run to run _simpleCoreMarker
                _prepareLayout removed css loading

Modified:   /BLUE_FRAMEWORK/modules/example_generate/lang/example_generate_en-GB.php
            -- Removed --
                show source translation, now moved to core translations

Modified:   /BLUE_FRAMEWORK/modules/example_generate/lang/example_generate_pl-PL.php
            -- Removed --
                show source translation, now moved to core translations

Modified:   /BLUE_FRAMEWORK/modules/example_layout/example_layout.php
            -- Added --
                _prepareLayout to load module template and set translations
            -- Updated --
                run to run _prepareLayout

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

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

Modified:   /BLUE_FRAMEWORK/modules/example_generate/layouts/index.html
            -- Added --
                additional menu
            -- Updated --
                whole structure to show correct content

Modified:   /BLUE_FRAMEWORK/elements/css/styles.css
            -- Added --
                styles of back to top and show source block

Modified:   /BLUE_FRAMEWORK/elements/layouts/examples/examples.html
            -- Added --
                new example link

Modified:   /BLUE_FRAMEWORK/modules/example_layout/layouts/index.html
            -- Added --
                base structure to show layout usage examples

Modified:   /BLUE_FRAMEWORK/cfg/tree.xml
            -- Updated --
                changed structure to handle some new example pages

Modified:   /BLUE_FRAMEWORK/elements/layouts/examples/example.html
            -- Added --
                optional structure to generate content in core template from generate example
            -- Removed --
                additional menu

Removed:    /BLUE_FRAMEWORK/modules/example_generate/elements/css/css.css
            -- Removed --
                unused style, all styles moved to main example style file