Release 5.0.0-alpha3 (#476)

* 95 additional icons; including file types, directional, and some existing and new brand icons
* Wrong content type in generated CSS #458
* Removal of query string from static resources #458
* SVG font ID's are incorrect in webfont implementation #474

svgs/regular/level-up-alt.svg

@@ -0,0 +1,9 @@
+<!-- Generator: Adobe Illustrator 21.1.0, SVG Export Plug-In  -->
+<svg version="1.1"
+	 xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:a="http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/"
+	 x="0px" y="0px" width="320px" height="512px" viewBox="0 0 320 512" style="enable-background:new 0 0 320 512;"
+	 xml:space="preserve">
+<path d="M296.64,99.674l-96.16-96.16c-4.686-4.687-12.285-4.686-16.97,0L87.353,99.671c-7.536,7.536-2.198,20.484,8.485,20.485
+	L164,120.158V456H64c-3.183,0-6.235,1.264-8.485,3.515l-32,32C15.955,499.074,21.309,512,32,512h164c13.255,0,24-10.745,24-24
+	V120.159l68.154,0.001C298.78,120.16,304.22,107.254,296.64,99.674z"/>
+</svg>