Switch to new bundled fastboot.js

This simplifies cache busting greatly without needing to do further
processing on any fastboot.js code before deploying. It also removes the
need for a non-module script with global scope.

process_static

@@ -7,7 +7,7 @@ export PATH="$PWD/node_modules/.bin:$PATH"
 
 rm -rf static_tmp
 cp -a static static_tmp
-rm -rf static_tmp/js/fastboot/{.git,demo,README.md}
+rm -rf static_tmp/js/fastboot/{!(dist),dist/!(fastboot.min.js|libs)}
 
 for file in static_tmp/**/*.@(json|webmanifest); do
     json_reformat -m < "$file" | sponge "$file"