New wrapper function email_set_gpgkey.
Mailer facility class.

This class is used to create eml files. Internaly phpmailer is
used for eml creation.
MAIL_QUEUE_PATH added in Config.

This configuration directive specifies which directory will be used to
store eml files before they are send to its designated destination.
Random class.

The class offers a method for reading a data from /dev/urandom. The
data are converted to hexadecimal string before being returned.
New API action email_send.

This action queues an email file. Content is created based on data
POSTed to this script along with essential metadata (sender, recipient
etc.).
Early version of mailer.

Link to mailer (aka sender) was placed in the top menu for easy access.
So far, only eml file creation is functional based on user's input.