Fixes #2919 Rewriting setup using simplePlugin and config classes

Conflicts:
	html/themes/default/setup.css
	plugins/config/class_configInLdap.inc
	setup/class_setupStep_Checks.inc
	setup/class_setupStep_Config1.inc
	setup/class_setupStep_Config2.inc
	setup/class_setupStep_Config3.inc
	setup/class_setupStep_Finish.inc
	setup/class_setupStep_Language.inc
	setup/class_setupStep_Ldap.inc
	setup/class_setupStep_Migrate.inc
	setup/class_setupStep_Welcome.inc
	setup/setup_checks.tpl
	setup/setup_config1.tpl
	setup/setup_config2.tpl
	setup/setup_finish.tpl
	setup/setup_frame.tpl
	setup/setup_welcome.tpl