Add visual indicator to status bar when a fatal failure occurs.

When a fatal failure occurs, a error indicator is added to the status bar, flashes red once, and then turns back to transparent background.

A modal dialog will open when the indicator is clicked, reporting the error, and providing a way to go to the error in the document.

The status bar indicator will go away as soon as Reporter.prototype.checkFatal returns false (no more fatal error).
Switch to using Mustache templates for error dialog.

Make fatal errors emit a 'fatalError' event from linterReporter.
Remove 'Go To Error' button as the cursor could not be seen after its use.
Create pulsing icon for status bar.
Fix fatal error not clearing upon switching from fatal errored file to a file with no applicable linters registered.
Move globals linter config to .jshintrc, add 'use strict'.
Merge pull request #49 from Mark-Simulacrum/add-visual-indicator-fatal-fails

Add visual indicator when a fatal failure occurs