Add ResourceGetter util

src/main/kotlin/group/ouroboros/potrogue/util/ResourceGetter.kt

@@ -0,0 +1,14 @@
+package group.ouroboros.potrogue.util
+
+import java.net.URL
+import java.nio.file.Files
+import java.nio.file.Paths
+
+class ResourceGetter {
+    fun downloadFile(url: URL, fileName: String) {
+        url.openStream().use { Files.copy(it, Paths.get(fileName)) }
+    }
+
+    //EXAMPLE USAGE
+    //  ResourceGetter().downloadFile(URL("https://url.to/resource.txt"), "location/to/store/resource.txt")
+}