Changes since version 1.4:

 * Fixed memory leaks in messagebase and subfields operations

 * Added some sanity checks. Documentation updated.

 * Compile-time configurable file locking method - lockf(3) vs. fcntl(2).

 * Fixed infinite loop in JAM_CreateMB that happens if newly
   created messagebase can not be locked.

 * Eliminated (I hope) compiler warnings about uchar/ulong/ushort
   on FreeBSD.

 * QNX support.

Changes since version 1.3:

 * Win32 support via autoconf

 * JAM_ChangeMsgHeader() now updates UserCRC in index and ActiveMsgs
   in header if message's Attribute contains MSG_DELETED.

 * New function JAM_DeleteMessage() - delete message from
   messagebase by setting HdrOffset and UserCRC to 0xFFFFFFFF.

Changes since version 1.2:

 * JAM_AddMessage() would fail when trying to add an empty message
   to the messagebase under Linux. Fixed.

 * Moved to GNU autotools

Changes since version 1.1:

 * Since JAM_GetSubField() is not reentrant and cannot be used in 
   multi-threaded applications, JAM_GetSubField_R() was added as a
   replacement for cases where a reentrant function is needed.   

Changes since varsion 1.0:

 * Added support for Win32 and Linux

 * Added JAM_AddEmptyMessage()

 * Rewrote the Makefiles

 * Rewrote the CRC32 routine

 * Fixed broken JAM_FindUser()

 * Fixed broken JAM_GetSubfield()

 * Changed JAM_OpenMB so that files are opened in binary mode. This is
   necessary to use JAMLIB under Windows.
 
 * Improved JAM_ReadMsgHeader() to give the error JAM_NO_MESSAGE if
   the message no longer exists in the messagebase and JAM_CORRUPT_MSG
   if the subfields of the message have been corrupted.

 * Improved portability by changing JAMLIB so that it no longer reads
   and writes stuctures directly using fread() and fwrite().

 * Improved ANSI-C compatibilty by no longer including the non-ANSI
   header file memory.h and using feof() to check for EOF instead of
   errno == EPASTEOF.

 * Added an #ifdef so that ushort and ulong are no longer defined in
   jam.h when compiling under Linux. These are normally already defined 
   in the standard header files.