Added arakoon and camltc dependency.
arakoon 1.6.6
ocamltc depends on lwt and ounit, thanks travis.
camltc require OCaml 4.00.0 or newer.
camltc/arakoon need lwt >= 2.4.3
Merge pull request #1423 from vbmithr/master

Added arakoon and camltc dependency.