Code Cleanup

- Relocated the Table::getCharLength() from Johannes to text.cpp/characters()
  because it is a general-purpose function, and will be the start of the UTF8
  conversion of all text.cpp code.
- Added unit tests for characters().

src/tests/text.t.cpp

@@ -34,7 +34,7 @@ Context context;
 ////////////////////////////////////////////////////////////////////////////////
 int main (int argc, char** argv)
 {
-  UnitTest t (191);
+  UnitTest t (194);
 
   // void wrapText (std::vector <std::string>& lines, const std::string& text, const int width)
   std::string text = "This is a test of the line wrapping code.";
@@ -387,6 +387,11 @@ int main (int argc, char** argv)
   t.is (strippedLength (std::string ("\033[0m")),                           0, "strippedLength ^[[0m                        -> 0");
   t.is (strippedLength (std::string ("\033[1m\033[0m")),                    0, "strippedLength ^[[1m^[[0m                   -> 0");
 
+  // int characters (const std::string&);
+  t.is (characters ("Çirçös"),            6, "characters (Çirçös) == 6");
+  t.is (characters ("ツネナラム"),        5, "characters (ツネナラム) == 6");
+  t.is (characters ("Zwölf Boxkämpfer"), 16, "characters (Zwölf Boxkämpfer) == 6");
+
   return 0;
 }