Create a default contact category on install

Yes yes yes. Users are much happier changing a preset than filling in a blank canvas. This is a big little annoyance we can remove here. Will apply the patch and report back. First feedback would be that 'default' may be too generic a label ("Oh dear, that's the default, best not change that"). I find myself typically using the suggested 'website feedback' all the time.

Bojhan wanted some screenshots:

BEFORE PATCH (current behavior):

If user installs contact.module the site-wide contact form and goes to /contact this is what the admin sees:
http://drupal.org/files/issues/597540-before-form2.png

This is what the non-admin users on the site see at /contact (if the user created a menu link to the contact form but didn't set it up)
http://drupal.org/files/issues/597540-before-form1.png

The admin then usually goes to admin/structure/contact and has to add a default category that usually just goes to the site's e-mail address.
http://drupal.org/files/issues/597540-before-settings.png

AFTER PATCH:

User installs contact.module and it automatically adds the default category and uses the site's e-mail address as the recipient. This would be what the contact settings look like after the module is installed without any kind of intervention or adjusting:
http://drupal.org/files/issues/597540-after-settings.png

After install, if the admin user or any non-admin users go to /contact this is what they would see (a working contact form):
http://drupal.org/files/issues/597540-after-form.png

I think that this is a good change, as yoroy explained it is important to have good defaults. Since people have a better understanding of what it does, most importantly though when you enable contact module. You can immediately see it working - which avoids a confusion upfront.

This is RTBC

Re-rolled for latest commits.

Automatically closed -- issue fixed for 2 weeks with no activity.