Workiva/wGulp — pull request #92 by maxwellpeterson-wf (2014-10-28 21:45:59+00:00)
Title: Echo a system bell on all errors to alert the user

Fixes #84

## Problem
Sometimes the user may not know that a wGulp watch or task has failed.

## Solution
Alert them with a system bell.

## Testing
- Create some error scenario:
- Missing JSX closing tag
- Violate jshint or tslint rule
- Listen for the bell on a build

@trentgrover-wf
@evanweible-wf

FYI: @patkujawa-wf