Ketrew 1.1.0

Changes:

• Much more testing, with bisect_ppx
  coverage, and adding a 4-nodes virtual Hadoop
  cluster to the integration tests.
• 84b5ec0
  Improve error message in generic_ssh_exec.
• 71b51b2 Cohttp 0.18.0
  compatibility (PR #186
  by @rgrinberg).
• 8f3b881
  Put a bound on successive non-fatal failures per target.
• 8da0c94
  Make target equivalence a symmetric relation.
• f599da6
  Improve documentation of the EDSL (backported to the
  1.0.0
  website).
• 4d96eec
  Add new option to daemonize: ?no_log_is_ok (serialization is backwards
  compatible with 1.0.0).
• bec6de0
  Free YARN backend from shared filesystems.