CRAN release 0.11.3

• Implements serialization() for registering custom serialization and unserialization functions when using daemons.
• Introduces call_mirai_(), a user-interruptible version of call_mirai() suitable for interactive use.
• Simplification of mirai() interface:
  • '.args' will now coerce to a list if an object other than a list is supplied, rather than error.
  • '.signal' argument removed - now all 'mirai' signal if daemons are set up.
• everywhere() now returns invisible NULL in the case the specified compute profile is not set up, rather than error.
• mirai() specifying a timeout when daemons() has not been set - the timeout begins immediately rather than after the ephemeral daemon has connected - please factor in a small amount of time for the daemon to launch.
• make_cluster() now prints daemon launch commands where 'url' is specified without 'remote' whether or not interactive.
• Cluster node failures during load balanced operations now rely on the 'parallel' mechanism to error and no longer fail early or automatically stop the cluster.
• Fixes regression since 0.11.0 which prevented dispatcher exiting in a timely manner when tasks are backlogged (thanks @wlandau #86).
• Improved memory efficiency and stability at dispatcher.
• No longer loads the 'promises' package if not already loaded (but makes the 'mirai' method available via a hook function).
• Requires nanonext >= 0.11.0.