library for Microsoft compression formats (documentation)

 The purpose of libmspack is to provide both compression and decompression of
 some loosely related file formats used by Microsoft. The intention is to
 support all of the following formats: COMPRESS.EXE [SZDD],
 Microsoft Help (.HLP), COMPRESS.EXE [KWAJ], Microsoft Cabinet (.CAB),
 HTML Help (.CHM), Microsoft eBook (.LIT), Windows Imaging Format (.WIM),
 Exchange Offline Address Book (.LZX).