Update of flightline system to allow extended pre-mods.
  -- additional fixing to the whole of the FixedComp system
     to deal with common rules and main rules. This separation
     allows a LinkUnit to be used in complement form without
     a divider being affected. E.g if a cylinder + a plane divider
     are complemented only the cylinder changes sign.

     Updates from Goran for a better TS1.

     Modifications to SrcData/DSTerm and SourceCreate. Some are Goran's
     and some are Alberto's for sinbad.