Cog 0.10.0

Enhancements

• Automatically create Cog accounts for new users #277 (Slack only)
• Commands can abort pipelines and return simple errors #691
  • Released pycog3 v0.1.27
  • Released cog-rb v.0.1.8
• Eliminate spammy log messages in Cog's console #841
• format:table now supports field names and paths to fields #784