add check for option `fe_stop_emails_log_email`

Add check for option `fe_stop_emails_log_email`, this value is still filterable
and if not set will return false, which is the same default value
previously set
add index.php files to prevent directory browsing

This file was included in the root of the project previously but
was removed as it was incorrectly assumed to be causing an error.
add file to house admin-settings code
include file which will house admin settings code
add social media links in readme.txt

Add built by with twitter and Google plus links
update option to use value in serialized array

Changing to using a serialized array stored as an option
rather than the actual option being stored gives me flexibility
for the future and allows me to use the Settings API in creating
the admin page
add admin settings page

First version of admin settings page to toggle whether or
not the plugin logs outgoing emails
correct broken state - logging disabled

A previous commit removed the error_log line used when logging emails.
This prevented the error_logging functionality.
add function calls to enable translation in admin

Added _e and __ function calls with the correct text-domain in the admin
section to enable translation