v3.2.3 Release

• Regardless of --jobinterval setting, mrp will now never have more than one
  queue command pending at a time, to avoid overloading the job server or
  equivalent.
• mrp will now shut down if the pipestance log file has been deleted, even if
  a new one has been created in its place. This prevents bad behavior in the
  somewhat common case where the pipestance directory (including the log) and
  lock files) has been deleted.
• The script to check the status of the job queue on SGE has been modified to
  be faster and use less ram.
• Fixed a bug in handling of the retain parameter for pipelines.
• The mount options are now reported for the mounts on which the pipestance and
  binary directories are located.
• Memory cgroups limits are now detected, reported, and used as default limits
  where applicable. This should be especially helpful for users submitting mrp
  to a cluster such as SLURM which uses memory cgroups to prevent jobs from
  using too much memory, by preventing mrp from trying to use more than the
  job's allowance.
• Martian can now (experimentally) be built experimentally with bazel.