Originally i loaded the requirements through calling the web api in
javascript, but decided to switch it to jinja as i only recently found
out its capable of stuff more complicated than replacing strings.
The admin page now has the option to send an invite to an email address.
Since there are now two email types (invites and pw resets), the new
sections have been added to config.ini, and email_template and
email_plaintext have been renamed to email_html and email_text
respectively.
