New in this release (v0.99)
---------------------------
1) Bug fixes: "!.." works if ".." is in cmdline history.
   (plus a few minor fixes)

2) 'x' no longer exits yaos. Both 'exit' and Alt-x will. If you want 'x' to
   exit yaos, make it an alias.

3) Environment variable expansion works now. For example, you can do something
   like this:   set path=%path%c:\mydir;

4) No longer exits unnecessarily when Ctrl-C is pressed while executing a
   command. In fact, yaos mask out SIGINT signals, but not SIGBREAK signals.

5) Use of '&' to detach a process like in Unix.

6) New command "kill <pid>" kills a process whose id is <pid> (<pid> can be
   specified in hexadecimal (e.g., 0x261) or decimal (e.g., 609). Use the
   OS/2 command "pstat /c" to find out the pid of active processes.

New in release v0.98a
---------------------
This release fixes a bug in v0.98 relating to writing aliases to files.
It has no additional feature over v0.98.

New in release v0.98
--------------------
1) The '-r <filename>' option is obsolete. In its place, a new option
   '-s <filename>' is added. The file may contain both alias definitions
   and environment variables settings.

2) The command "alias -r <filename>" is now replaced by a more general
   command called "source <filename>". The contents of <filename> may
   contain both alias definitions and environment variables settings.

3) Alias expansions will not be shown if the '-q' flag is used.

4) Alias definition in a file requires the "alias" keyword. Previously, an
   alias definition in a file looked like:
           c=cls
   Now, it must be defined as:
           alias c=cls OR
           alias c cls

5) Verify on/off settings work now.

6) Hitting the <Esc> key clears the command line.