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/text.h

@@ -31,7 +31,7 @@
 #include <vector>
 #include "../auto.h"
 
-// text.cpp
+// text.cpp, Non-UTF-8 aware.
 void wrapText (std::vector <std::string>&, const std::string&, const int);
 std::string trimLeft (const std::string& in, const std::string& t = " ");
 std::string trimRight (const std::string& in, const std::string& t = " ");
@@ -60,5 +60,8 @@ std::string::size_type find (const std::string&, const std::string&, bool sensit
 std::string::size_type find (const std::string&, const std::string&, std::string::size_type, bool sensitive = true);
 int strippedLength (const std::string&);
 
+// UTF-8 aware.
+int characters (const std::string&);
+
 #endif
 ////////////////////////////////////////////////////////////////////////////////