message: Utilize bug  details in error msg
diff: @@ -40,18 +40,20 @@ export class BlockstackError extends Error {
  constructor(error: ErrorType) {
  let message = error.message
  - let bugMessage = `Error Code: ${error.code}`
  + let bugDetails = `Error Code: ${error.code}`
  let stack = null
  + if (!stack) {
  try {
  throw new Error()
  } catch (e) {
  stack = e.stack
  }
  - if (stack) {
  - bugMessage += `\nStack Trace:\n${stack}`
  + } else {
  + bugDetails += `Stack Trace:\n${stack}`
  }
  message += '\nIf you believe this exception is caused by a bug in blockstack.js'
  + ', please file a bug report: https://github.com/blockstack/blockstack.js/issues'
  + + '\n\n' + bugDetails
  super(message)
  this.message = message
  