added switching between search engines

- works with different languages
- works with links

refactored selector code:
- changed method names
- changed method parameters (object -> id),
- added method to rename all options of dropdown menu

refactored distance format selector code:
- changed method names
- changed variable names
- changed how to init/select element/change language of dropdown menu

refactored maintenance notification overrides:
- changed names of default variables

WebContent/localization/OSRM.Locale.de.js

@@ -66,6 +66,10 @@ OSRM.Localization["de"] = {
 // printing
 "OVERVIEW_MAP": "Übersichtskarte",
 "NO_ROUTE_SELECTED": "Keine Route ausgewählt",
+//routing engines
+"ENGINE_0": "Auto (schnellste Strecke)",
+"ENGINE_1": "Auto (nur Polen)",
+"ENGINE_2": "Fahrrad (nur Polen)",
 // directions
 "N": "Norden",
 "E": "Ost",

WebContent/localization/OSRM.Locale.en.js

@@ -66,6 +66,10 @@ OSRM.Localization["en"] = {
 // printing
 "OVERVIEW_MAP": "Overview Map",
 "NO_ROUTE_SELECTED": "No route selected",
+// routing engines
+"ENGINE_0": "Car (fastest route)",
+"ENGINE_1": "Car (Poland only)",
+"ENGINE_2": "Bike (Poland only)",
 // directions
 "N": "north",
 "E": "east",

WebContent/localization/OSRM.Localization.js

@@ -54,8 +54,8 @@ setLanguageWrapper: function(language) {		// wrapping required to correctly prev
 },
 setLanguage: function(language) {
 	// change value of both language selectors
-	OSRM.GUI.selectorChange( document.getElementById('gui-language-toggle'), language );
-	OSRM.GUI.selectorChange( document.getElementById('gui-language-2-toggle'), language );
+	OSRM.GUI.selectorChange( 'gui-language-toggle', language );
+	OSRM.GUI.selectorChange( 'gui-language-2-toggle', language );
 	
 	if( OSRM.Localization[language]) {
 		OSRM.Localization.current_language = language;