+ Added mzip contrib library

Best regards,
Miguel Angel Marchuet

P.D. README file:

This folder contains compression related files including:
  * zip file support based on minizip library 
(http://www.winimage.com/zLibDll/minizip.html)
    including:
    * minizip version 1.01e source files
    * wrapper functions for minizip
    * some additionl functions to provide a higher level API for zip files

Some small changes (to fix compile time warning and errors) are applied to 
original
source of minizip 1.01e:

   * harbour/contrib/hbzlib/zip.c
     * added forward definitions of allocate_new_datablock(),
       free_datablock(), init_linkedlist(), add_data_in_datablock(),
       ziplocal_TmzDateToDosDate()
     * pacified warnings of unused args dosDate and crcForCrypting
     * fixed 2 warnings: assigned value is not used. See, TOFIX
       comment for one of the fixes
     * fixed BCC warning "function call with no prototype" by changing
            local int zipFlushWriteBuffer(zi)
               zip_internal* zi;
            {
       to
            local int zipFlushWriteBuffer(zip_internal* zi)
            {
       I expected this code be equivavlent! ??? :/

   * harbour/contrib/hbzlib/unzip.c
     * added forward definitions of strcmpcasenosensitive_internal(),
       unzlocal_DosDateToTmuDate(), unzlocal_CheckCurrentFileCoherencyHeader()
     * fixed 8 warnings: assigned value is not used. See, TOFIX
       comment for one of the fixes

   * harbour/contrib/hbzlib/ioapi.c
     * pacified 7 warnings: unused args opaque
     * fixed warning: assigned value is not used


Harbour functions to mange ZIP files:
=====================================

HB_ZipOpen( cFileName, [ iMode = HB_ZIP_CREATE ],
             [ @cGlobalComment ] ) --> hZip
HB_ZipClose( hZip, [ cGlobalComment ] ) --> nError
HB_ZipFileCreate( hZip, cZipName, dDate, cTime,
                   nInternalAttr, nExternalAttr,
                   [ nMethod = HB_ZLIB_METHOD_DEFLATE ],
                   [ nLevel = HB_ZLIB_COMPRESSION_DEFAULT ],
                   [ cPassword ], [ cComment ] ) --> nError
HB_ZipFileWrite( hZip, cData [, nLen ] ) --> nError
HB_ZipFileClose( hZip ) --> nError
HB_ZipStoreFile( hZip, cFileName, [ cZipName ], ;
                  [ cPassword ], [ cComment ] ) --> nError


HB_UnzipOpen( cFileName ) --> hUnzip
HB_UnzipClose( hUnzip ) --> nError
HB_UnzipGlobalInfo( hUnzip, @nEntries, @cGlobalComment ) --> nError
HB_UnzipFileFirst( hUnzip ) --> nError
HB_UnzipFileNext( hUnzip ) --> nError
HB_UnzipFilePos( hUnzip ) --> nPosition
HB_UnzipFileGoto( hUnzip, nPosition ) --> nError
HB_UnzipFileInfo( hUnzip, @cZipName, @dDate, @cTime,
                   @nInternalAttr, @nExternalAttr,
                   @nMethod, @nSize, @nCompressedSize,
                   @cComment ) --> nError
HB_UnzipFileOpen( hUnzip, [ cPassword ] ) --> nError
HB_UnzipFileRead( hUnzip, @cBuf [, nLen ] ) --> nRead
HB_UnzipFileClose( hUnzip ) --> nError
HB_UnzipExtractCurrentFile( hZip, [ cFileName ], [ cPassword ] ) --> nError


HB_ZipDeleteFile( cZipFile, cFileMask ) --> nError

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