E-Mail Templates

I did not like the e-mails sent by ownCloud, they were a bit 'clunky'.

So, I implemented two templates, one 'mail' and one 'altmail' for the HTML and ASCII e-mails. The 'built-in' templates use the original translations, and should be backwards-compatible with the old code in 5.0.

A logo-mail.gif is added, which is a modification of logo-wide.png because several mail-clients (including Outlook 2007 and several versions of Lotus notes) do not support .png images.

It is a drop-in replacement for the existing mail feature without breaking any translations and allows users to theme their e-mails.

If you agree with this patch, I'll get a contributor-agreement signed by my employer.

Regards,

Stephan