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/solid/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="M313.553,119.669L209.587,7.666c-9.485-10.214-25.676-10.229-35.174,0L70.438,119.669C56.232,134.969,67.062,160,88.025,160
+	H152v272H68.024c-3.183,0-6.235,1.264-8.485,3.515l-56,56C-4.021,499.074,1.333,512,12.024,512H208c13.255,0,24-10.745,24-24V160
+	h63.966C316.844,160,327.817,135.031,313.553,119.669z"/>
+</svg>