Make full example modules (issue #20)

This version introduces multiple enhancements:

added incoming data example
fix for core templates template

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

Added:      /BLUE_FRAMEWORK/modules/example_incoming_data/layouts/index.html
            -- Added --
                template with incoming data examples

Added:      /BLUE_FRAMEWORK/modules/example_incoming_data/example_incoming_data.php
            -- Added --
                incoming data example main file

Added:      /BLUE_FRAMEWORK/modules/example_incoming_data/lang/example_incoming_data_pl-PL.php
            -- Added --
                polish translations

Added:      /BLUE_FRAMEWORK/modules/example_incoming_data/lang/example_incoming_data_en-GB.php
            -- Added --
                english translations

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

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

Modified:   /BLUE_FRAMEWORK/elements/layouts/examples/examples.html
            -- Added --
                description for incoming data example
                variable in url to incoming data example

Modified:   /BLUE_FRAMEWORK/modules/example_core_templates/layouts/index.html
            -- Updated --
                fixed code view formatting

Modified:   /BLUE_FRAMEWORK/cfg/tree.xml
            -- Added --
                incoming data and libraries example pages