patch applied (cabal-install): Remove the Makefile and the redundant install instructions

[Duncan Coutts]

Thu May  3 12:41:08 PDT 2007  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
  * Remove the Makefile and the redundant install instructions
  We can now install purely using cabal, no Makefile needed.
  The install instrcutions previously said to install the data
  file manually, but cabal does that for us now.

    R ./INSTALL
    R ./Makefile
    R ./etc-cabal-install/