All errors and warnings should have a Code and HelpLink property set

[CZEMacLeod]

See

• GenerateBindingRedirects task emits warning without code - unable to suppress #69 (comment)
• Emit an actionable error when Microsoft.WebApplication.targets / WebApplicationsTargetPath cannot be resolved #106 (comment)

A list of all the possible error/warning messages with ID's should be added to the Wiki and/or docs and all the messages updated to include error numbers.

This issue is here to track the progress of implementing this.