Add support for popup notifications with --notify.

[grayside]

Fixes #84

Happy Holidays.

[arithmetric]

This is great!

One request: Could we add a Gruntconfig.json setting to enable this by default (rather than requiring the command-line option)?

[grayside]

I thought it would be annoying for some tasks, like help. I looked for a way to check the currently running task and configure that by default and had trouble.

The current implementation is using the hook/event system to automatically fire, I'll see if there's a way to whitelist.

If that fails we can configure custom notifications for long tasks and disable automatic success notifications.

I'm not sure what happens on headless systems, I expect it's a noop.

[grayside]

I'll start with a bonus option, configurable execution time after which to use the message. This was a killer piece in how drush notify came together.

[arithmetric]

👍

[grayside]

Had to fork grunt-notify to do it (dylang/grunt-notify#89) but the last idea is now working. Changes in the latest commit:

• --notify is dropped. --quiet is added.
• GRUNT_DRUPAL_QUIET environment variable added, same as quiet.
• Switched a fork of grunt-notify.
• Added threshold concept, notifications that are triggered before the process.uptime() is less than a certain number of seconds will be suppressed.
• Added new Gruntconfig parameter to managed this for GDT with 10 second default.