ensure .ardour directory is created, update build docs

git-svn-id: svn://localhost/trunk/ardour2@406 d708f5d6-7413-0410-9779-e7cbd77b26cf

DOCUMENTATION/BUILD

@@ -60,11 +60,9 @@ requirement.
 	   - see ftp://ftp.gnome.org/pub/GNOME/MIRRORS.html
 	      and then follow to sources/libart_lgpl
 	    
-       glib 1.2   (http://www.gtk.org)
-           glib-1.2.8 (included with most distributions)
+       Glib 2.6   (http://www.gtk.org)
 
-       GTK+ 1.2   (http://www.gtk.org)
-	gtk+-1.2.8 (included with most distributions)
+       GTK+ 2.6   (http://www.gtk.org)
 
        libglade2 (http://www.gnome.org/)
 	unsure of minimum version. XXX todo.

libs/ardour/globals.cc

@@ -311,7 +311,11 @@ ARDOUR::get_user_ardour_path ()
 		
 	path = envvar;
 	path += "/.ardour/";
-	
+
+	/* create it if necessary */
+
+	mkdir (path.c_str (), 0755);
+
 	return path;
 }