Release Scripts

Added a script for polling Maven Central to notify when release is
uploaded.

scripts/release/wait-for-done

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+VERSION=$1
+until http -h --check-status --ignore-stdin https://repo1.maven.org/maven2/org/springframework/security/spring-security-core/$VERSION/; do sleep 10; clear; done; spd-say "It is now uploaded"