I18N

- One does not simply std::string::substr a UTF8 string, like a bloody caveman.
  Implemented utf8_substr, and added unit tests.

test/CMakeLists.txt

@@ -8,7 +8,8 @@ include_directories (${CMAKE_SOURCE_DIR}
 
 set (test_SRCS autocomplete.t color.t config.t date.t directory.t dom.t
                duration.t file.t i18n.t json.t list.t nibbler.t path.t rx.t
-               t.t t2.t taskmod.t tdb2.t text.t uri.t util.t view.t json_test)
+               t.t t2.t taskmod.t tdb2.t text.t uri.t utf8.t util.t view.t
+               json_test)
 
 message ("-- Configuring run_all")
 set (TESTBLOB "*.t")