Weekly newsletter

xF2 Add-on Weekly newsletter 1.8

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Added the ability to add an announcement.
Added "stats" function to show how many emails will be sent. See Questions and answers in the Overview for more information.
Removed the built-in import function as now there is a stand-alone add-on for importing.
Security update. The emoji field in the options page has been removed, you can add a emoji to the weeklynewsletter_subject phrase.
Updated descriptions in the options page.
Now supports high resolution logo image.