Updated to include the RUNOFF command for generating the system help
file in INSTALL.TXT.

This fixes #78.
Updated the bootstrap procedure. This fixes #77.

The following changes were made:

  * Put files in architecture specific directories, in line with the
    behaviour of DESCRIP.MMS.

  * Output message announcing it is a bootstrap build.

  * SET VERIFY to allow printing of compile commands as they are
    executed.
Merge branch 'master' into issue-73