Register email 4.1

Register email v2.1 changes:

Fix issue dealing with members changing their email address.

Register email v2.0 changes:

Corrects issue regarding sending emails when a member updates their email. Also fixed issue dealing with custom user fields where those that are not shown during registration were being included.

Register email v1.9 changes:

Improved formatting of email.

Register email v1.8 changes:

Added two links to the email and fixed a formatting issue dealing with custom user fields.

Register email v1.7 changes:

Updated code so that register email is sent to the staff only after the email confirmation has been verified.

Register email v1.6 changes:

Added Search by IP address link.

Register email v1.5 changes:

Now supports sending emails to multiple staff members.

Register email v1.4 changes:

Fixed email subject phrasing.

Register email v1.3 changes:

Updated Options page to only allow verified user.

Register email v1.2 changes:

Added code to prevent error message if $user value is empty.