added first revision of theme settings in admin module

interface/web/admin/form/system_config.tform.php

interface/web/admin/form/tpl_default-v2.tform.php

interface/web/admin/form/tpl_default.tform.php

interface/web/admin/lib/interface.d/tpl_default-v2.menu.php

interface/web/admin/lib/interface.d/tpl_default.menu.php

...rface/web/admin/templates/system_config_branding_edit.htm

interface/web/admin/templates/tpl_default-v2_basic.htm

interface/web/admin/templates/tpl_default_basic.htm

interface/web/admin/tpl_default-v2.php

interface/web/admin/tpl_default.php

interface/web/themes/default-v2/CHANGELOG

...hemes/default-v2/templates/admin/tpl_default-v2_basic.htm

...b/themes/default-v2/templates/admin/tpl_default_basic.htm