Change default framework view (issue #17)

This version introduces multiple enhancements:

changed some styles for default view, some changes in html structure (all fielsdet replaced by div)

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

Modified:   /BLUE_FRAMEWORK/modules/modul1/elements/css/base2.css
            -- Removed --
                color for links
Modified:   /BLUE_FRAMEWORK/elements/css/bootstrap_dark.css
            -- Updated --
                changed border for label element

Modified:   /BLUE_FRAMEWORK/modules/mod2/layouts/form_definition.xml
            -- Updated --
                changed element classes to apply bootstrap dark

Modified:   /BLUE_FRAMEWORK/elements/layouts/index.html
            -- Updated --
                changed some elements, apply some styles

Modified:   /BLUE_FRAMEWORK/modules/modul1/layouts/layout1.html
            -- Updated --
                changed all fieldset to div

Modified:   /BLUE_FRAMEWORK/modules/modul1/layouts/layout1.html
            -- Updated --
                changed all fieldset to div