Add all FSK 18 articles to notification if region is DE

[dArignac]

This is a redefinition of #19 .

If the current set api region is DE and a product hits the price limit, and the product is a FSK 18 article, then also include all other subscribed FSK 18 products within the notification mail. These products shall be sorted, starting with the lowest price.

As we send text mails, this could look like this (just a suggestion, we'll see how this looks in a real mail):

The price limit of <PRICE-LIMIT> has been reached for the article "<PRODUCT>"
Current price is at<PRICE> (<DATE-OF-PRICE>).

Please support our platform by using this affiliate link for buying the product: http://www.amazon.de/dp/<ASIN>/?tag=<ASSOC-TAG>
Adjust the price limits for the products here: <DEEPLINK>

As this is a FSK 18 article, here are your other subscribed FSK 18 articles:

<PRODUCT>
<PRICE> (<DATE-OF-PRICE>)
<REFLINK>
<DEEPLINK>

<PRODUCT>
<PRICE> (<DATE-OF-PRICE>)
<REFLINK>
<DEEPLINK>

Regards,
The Team

[dArignac]

Hm, this does not work when using stmp mailing, somehow gets stuck without exception and blocks everything. Need to rework.

[dArignac]

Additionaly, "Ages 18 and over" was not considered.