Fix to the VMSINSTAL installation procedure.

This fixes #55.
Significant changes to the PCSI installation files.  This gives the
installer far greater control over their environment.  Now it is
optional to install the documentation, online help, source code and
command.

The only non-optional things are the executable and the release notes.
Correction to release notes message.  We won't install them in SYS$HELP
either.
More changes to PCSI installation to give more control.  The only
thing we do differently is drop the product release notes in SYS$HELP.

Everything seems to drop them in there, and it makes sense.

This references #56.
Changed name so we don't have confusion with the new MMK_PCSI.COM procedures.
Further changes to support building a system startup procedure, as
well as removing it, if it was copied to SYS$STARTUP.

This references #56.
Rename procedure.