[Feature] Expose email templates

[mprajescu]

A necessity for setting up/customizing email templates for communications from the application. The initial template needs to be simple, but customizabile, with own logo and possibly another text

[mgogoulos]

That's a good suggestion, and an easy addition that can have a great impact

[mgogoulos]

Create a folder with all email templates, and move existing templates there (as user and media upload related)