New feature: SMTP mail services.

Hi, I'm trying to implement some new features, however I found that the mail system was not working.
To cut a long story short, my hosting only allows SMTP authentication. This is something that is not supported by the standard php `mail()` function. It means that all my users have not received their activation emails. And I could not test the features I'm trying to build.

I have searched around and found a very nice library named swiftmailer. It has been installed and combined with a wrapper I wrote for the PMF_Mail class, SMTP authentication is now possible.

I have setup the database and config to allow dynamic changing ( not in constants file ).

![New mail config panel](http://arduino.land/Images/FAQ/Debug/mail-config.png)
If used, the existing mail settings can be merged, and new ones added ( header, footer text ).
This patch isn't quite ready, it needs the rest of the language files filled out. What would be the best action to take.
- Modify the configuration.php to skip if the language entry isn't found,
- Or add the english stub to each language file so everyone can at least use the feature.

This is a critical feature for the usability of my FAQ, I hope you are interested in implementing it.

Cheers Chris A.