Don't install hydra-create

Dependencies

• [2] L4AI5YL6 Rename hydra_*.pl to hydra-*
• [3] A6EKITA6 Update the docs to reflect the renaming
• [4] FV2M6MOT hydra: use autoconf/-make
• [5] ARD6Z67T Do incremental SVN checkouts
• [6] FGI75W53 move nix-prefetch-* into tarball
• [7] KBW3FDZ2 Merge remote branch 'remotes/origin/master'
• [8] EKNK5AHQ doc: Augment the "Installation" section with material by Visser & Dolstra.

Change contents

• replacement in doc/manual/installation.xml at line 104
  [4.3048]→[3.0:136](∅→∅)
  − hydra-build hydra-evaluator hydra-update-gc-roots

  − hydra-create hydra-queue-runner

  − hydra-eval-jobs hydra-server</screen>
  [4.3048]

  [4.3255]
  + hydra-build hydra-evaluator hydra-server

  + hydra-eval-jobs hydra-queue-runner hydra-update-gc-roots</screen>
• edit in src/script/Makefile.am at line 11
  [2.159]→[2.159:176](∅→∅)
  − hydra-create \