SpiffyTitles - Add Steam handler

[metaltermite]

Add a configurable SpiffyTitles template for parsing game titles from Steam links

Links

Game links from Steam are follow this format afaik: https://store.steampowered.com/app/n/game-title, where n seems to be the numeric product id, and game-title seems to be purely cosmetic or for seo

Variables

I think the basic variables for the template can be:

Variables	Description
title	Product title
genre	Product genre found within <div class="popup_menu_subheader">
all_reviews	Product review summary of all reviews and total count eg. "Mostly positive (45,654)"
recent_reviews	Product review summary of recent reviews and count, eg. "Mixed (4,324)"
description	Description of product @ <meta property="og:description" content="...>
date	Release date of product
developer	Product developer
publisher	Product publisher
price	Product price
tags	"Popular user-defined tags for this product"

Notes

• Some games do not have a price (or are free) such as https://store.steampowered.com/app/238960/Path_of_Exile/
• Some games require an age check before accessing the page, such as https://store.steampowered.com/app/680420/OUTRIDERS/?snr=1_4_4__129_8 so I'm not sure if that will throw a wrench into scraping data
• Some games are on sale and have a discounted price. It would be cool to show that price with the discount <div class=\"discount_pct\">. Discounted games can be found here for testing purposes: https://store.steampowered.com/specials#tab=TopSellers
• The default template could probably be {{title}} {{date}} :: {{developer}} :: {{genre}} :: {{description}}