Renamed icarErrorResource to icarBatchResultMessage, and added icarBatchResultSeverityType enum.

Batch POSTS now always return an array of icarBatchResult, each of which may contain an array of icarErrorWarningMessageResource.

Single POSTs if successful return the posted object (ID filled in), otherwise they return an errors array of icarErrorWarningMessageResource.

Sorry for renaming the file, but it helped to clarify its purpose.

…-master

Renamed icarErrorWarningMessage Resource to icarResponseMessageResource based on feedback to PR adewg#232

Added URL schemes for management (animal sets, animal set join/leave, and devices), and performance (weights, conformation scores, breeding values).
Along with other commits, resolves adewg#154.

Based on comments in the PR.