rename view/tpl/nav.tpl to navbar_default.tpl so that all navbar selection code is consistent

boot.php

@@ -2090,7 +2090,7 @@ function construct_page() {
 
 	$installing = false;
 
-	$navbar = get_config('system','navbar','nav');
+	$navbar = get_config('system','navbar','default');
 	if(App::$profile_uid) {
 		$navbar = get_pconfig(App::$profile_uid,'system','navbar',$navbar);
 	}

doc/member/member_guide.bb

@@ -640,7 +640,7 @@ The condensed notation isn't part of Comanche itself but is recognised by $Proje
 	[navbar]tucson[/navbar]
 [/code]
 
-Use the 'tucson' navbar template and CSS rules. By default the 'nav' navbar template will be used.
+Use the 'tucson' navbar template and CSS rules. By default the 'default' navbar template will be used.
 
 
 [h4]Regions[/h4]

include/nav.php

@@ -6,7 +6,7 @@ require_once('include/security.php');
 require_once('include/menu.php');
 
 
-function nav($template = 'nav') {
+function nav($template = 'default') {
 
 	/**
 	 *
@@ -248,7 +248,7 @@ EOT;
 	}
 
 	if(! $tpl) {
-		$tpl = get_markup_template('nav.tpl');
+		$tpl = get_markup_template('navbar_default.tpl');
 	}
 
 	App::$page['nav'] .= replace_macros($tpl, array(