AlgoResponse third failure case needs a better description.

[zeryx]

The code snippet below is hard to decypher, I think the third failure case is thrown when the response is unable to be decoded into the requested type; which seems to occur when any algorithm error is thrown.

  /**
   * Parse server response into an AlgoResponse
   */
  def apply(rawOutput: String, outputType: AlgorithmOutputType): AlgoResponse = {
    val json = Json.parse(rawOutput)
    Json.fromJson[AlgoResponseRaw](json) match {
      case JsSuccess(AlgoResponseRaw(result, None, metadata),_) => AlgoSuccess(result, metadata.metadata, rawOutput)
      case JsSuccess(AlgoResponseRaw(_, Some(error), metadata),_) => AlgoFailure(error.message, metadata.metadata, rawOutput)
      case JsError(_) => AlgoFailure("Failed to parse algorithm response", Metadata(0, ContentTypeVoid, None), rawOutput)
    }
  }

Maybe this section should be more descriptive if this is intended functionality?