Add Customizations.

- Add PrismJS dependencies (baked-in)
- Add Ko-fi button (in-line)
- Bump dependencies to fix inability to build.
- Concatenate *.css into single source.css.

assets/images/ko-fi/whitelogo.svg

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xml:space="preserve"
+   style="enable-background:new 0 0 56.7 56.7;"
+   viewBox="0 0 56.7 56.7"
+   y="0px"
+   x="0px"
+   id="Layer_1"
+   version="1.1"><metadata
+     id="metadata15"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+     id="defs13" /><style
+     id="style3"
+     type="text/css">
+	.st0{fill:#FFFFFF;}
+</style><g
+     id="g5"><path
+       style="fill:#ffffff;fill-opacity:1"
+       id="path7"
+       d="m 23.959,10.600001 c -9.6,0 -17.4,7.8 -17.4,17.4 0,9.6 7.8,17.4 17.4,17.4 9.6,0 17.4,-7.8 17.4,-17.4 0,-9.6 -7.8,-17.4 -17.4,-17.4 z m 0.3,27.2 -0.5,0.2 -0.4,-0.2 c -0.4,-0.2 -9.8,-5.4 -9.8,-11.3 0,-3.8 2.5,-6.8 5.8,-6.8 1.6,0 3.1,0.7 4.5,2.1 1.3,-1.4 2.9,-2.1 4.5,-2.1 3.2,0 5.8,3 5.8,6.9 -0.1,5.8 -9.5,11 -9.9,11.2 z"
+       class="st0" /><path
+       style="fill:#ffffff;fill-opacity:1"
+       id="path9"
+       d="m 56.759293,28.5 c 0,-2.6 -2,-3 -3.4,-3.1 l -5.5,0 c -0.8,-8.4 -6,-15.7 -14.5,-19.4 -10.7,-4.6 -23.3,-0.7 -29.6,9.1 -7.6999993,12.1 -3.09999997,27.9 9.5,34.2 10.3,5.1 23.1,2 29.9,-7.3 2.5,-3.4 3.8,-6.9 4.3,-10.7 l 6.3,0 c 1.5,0 3,-0.5 3,-2.8 z m -40.8,17.7 c -11.3,-5 -15.39999897,-18.8 -8.7,-29.1 5.2,-8.2 15.8,-11.3 24.7,-7.4 11.3,5 15.4,18.8 8.7,29.1 -5.3,8.1 -15.9,11.3 -24.7,7.4 z"
+       class="st0" /></g></svg>