Changed to use common Makefile system.
Stewart Brodie authored
  Debug build facility added.
Detail:
  Uses core facilities from Common instead of having private copies.
  Makefile vastly simplified to simply define a few macros, then include
    the common Toolbox Makefile which is exported by Common.
Admin:
  Requires Common 0.09 or later (RiscOS/Sources/Toolbox/Common; Common-0_09)
  Requires BuildSys 1.92 or later (RiscOS/BuildSys; BuildSys-1_92)
  Requires Library 0.41 or later (RiscOS/Library; Library-0_41)

Version 0.21. Tagged as 'ColourMenu-0_21'
8445a02f