fixed site maps generation

This version introduces multiple enhancements:

fixed missing site map generation method and fixed site map generation
also added example of all maps generation in map module and module to generate site map for google crawler

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

Added:      /BLUE_FRAMEWORK/modules/map/map.php
            -- Added --
                example with working map, siteMap and breadcrumbs methods

Added:      /BLUE_FRAMEWORK/elements/layouts/podstrona4.html
            -- Added --
                html page to show map methods example

Modified:   /BLUE_FRAMEWORK/modules/main/main.php
            -- Updated --
                fixed usage of method to show site map, turned off benchmark methods

Modified:   /BLUE_FRAMEWORK/cfg/tree.xml
            -- Updated --
                changed /strona3/podstrona3/podstrona4 site to run new module map

Modified:   /BLUE_FRAMEWORK/packages/CORE/module_class.php
            -- Added --
                siteMap method to easier use of loader_class->siteMap()

Modified:   /BLUE_FRAMEWORK/packages/CORE/loader_class.php
            -- Added --
                siteMap method to easier use of tree_class->siteMap()

Modified:   /BLUE_FRAMEWORK/packages/CORE/tree_class.php
            -- Updated --
                changed name of sitemap method to siteMap and fixed problem with xml file version
                _siteSubMap fixed problem when $child->firstChild was an NULL