Dev plan 0.6

[xupeilin]

• Logpeck
  • Return any error log in testing
  • Add http api: error_log/reason
  • Add peck_status
  • Support user defined extractor/sender
  • Filter support regex
  • Doc
    • User manual
    • Protocol
• Web
  • Support batch add / update tasks
  • Save server / group / templates infos in local database
  • Independent http server(not kibana plugin)