Create cpl_string.h

/**********************************************************************
 * $Id: cpl_string.h,v 1.24 2006/03/21 20:11:54 fwarmerdam Exp $
 *
 * Name:     cpl_string.h
 * Project:  CPL - Common Portability Library
 * Purpose:  String and StringList functions.
 * Author:   Daniel Morissette, danmo@videotron.ca
 *
 **********************************************************************
 * Copyright (c) 1998, Daniel Morissette
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 **********************************************************************
 *
 * $Log: cpl_string.h,v $
 * Revision 1.24  2006/03/21 20:11:54  fwarmerdam
 * fixup headers a bit
 *
 * Revision 1.23  2006/02/19 21:54:34  mloskot
 * [WINCE] Changes related to Windows CE port of CPL. Most changes are #ifdef wrappers.
 *
 * Revision 1.22  2005/10/13 01:20:16  fwarmerdam
 * added CSLMerge()
 *
 * Revision 1.21  2005/09/14 19:21:17  fwarmerdam
 * binary pointer is const in binarytohex
 *
 * Revision 1.20  2005/08/31 05:08:01  fwarmerdam
 * fixed up std::string use for vc6 compatability
 *
 * Revision 1.19  2005/08/31 03:30:51  fwarmerdam
 * added binarytohex/hextobinary, CPLString
 *
 * Revision 1.18  2005/04/04 15:23:31  fwarmerdam
 * some functions now CPL_STDCALL
 *
 * Revision 1.17  2004/08/16 20:23:46  warmerda
 * added .csv escaping
 *
 * Revision 1.16  2004/07/12 21:50:38  warmerda
 * Added SQL escaping style
 *
 * Revision 1.15  2003/07/17 10:15:40  dron
 * CSLTestBoolean() added.
 *
 * Revision 1.14  2003/03/11 21:33:03  warmerda
 * added URL encode/decode support, untested
 *
 * Revision 1.13  2003/01/30 19:15:55  warmerda
 * added some docs
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