Generate skeleton notifier.
Method to send email notifications.
Actually send email on creating notifications.
Only send email notifications to members who want them.
Added email notification checkbox to settings
Actually add the view for the notifications.
a few small tweaks to email notification views
Merge pull request #150 from Skud/email_notifications

Email notifications
use fully qualified links in notification email
Merge pull request #152 from Skud/email_notifications

use fully qualified links in notification email
Tidy up URL handlers in notification email.

As per @jcaudle's comment
https://github.com/Growstuff/growstuff/pull/152#issuecomment-15563523
Merge pull request #154 from pozorvlak/url_helpers

Tidy up URL handlers in notification email.