add support for Views

Here's a patch that adds support for Views.

- from & to email fields can either link as a mailto: or to the user account if one exists for that email address
- subject, body, mail key, and mail id field can link to the full mail report page, provided the user has access
- the language field piggybacks Locale module's field handler to show the full name of the language
- language field filter and argument require locale module to be enabled
- if Date module is present, the generic date field can be used with all the features that Date provides -- such as date popups for filters.

This patch is cumulative on #1239398: don't use MySQL reserved words for column names -- it uses the updated column names from the patch there.

+1 Patch works for me. I can create and use a View with all mail logger fields. Thanks!

Hold on, not entirely. Db fields are "to" and "from", not "mail_to" and "mail_form". Rerolled the patch.

That is because my patch depends on #1239398: don't use MySQL reserved words for column names.

Dear all,

it lacks a views integration feature for Drupal 7 version.

Fixed for Drupal 6. Needs to be ported to Drupal 7.

Committed, thanks!