Add README.md

Dependencies

• [2] CLXEECMF * Start putting build results in a database.

Change contents

• file addition: README.md (----------)
  [2.2]
  + To start hacking on Hydra, run:

  +

  + $ ./dev-shell

  + $ ./configure $configureFlags --prefix=/opt/hydra

  + $ make

  + $ make install