Has Gradle download and install the browser rather than bundle it.

This is more flexible, and I couldn't exactly upload the Firefox installation to Git before.

build.gradle

@@ -9,11 +9,4 @@
  * For more details take a look at the Java Quickstart chapter in the Gradle
  * user guide available at https://docs.gradle.org/4.4.1/userguide/tutorial_java_projects.html
  */
-ext.defaultPackage = "edu.regis.universeplayer"
-
-task bundleAddOn(type: Zip)
-{
-    archiveName = "universalmusic@regis.edu.xpi"
-    destinationDir = file("./browser/profile/extensions")
-    from (files("./add-on"))
-}
+ext.defaultPackage = "edu.regis.universeplayer"