Clarify the documentation. Add the hash config to the example config. Uses duration in the delay field instead of the seconds.

src/test/java/io/kamax/mxisd/test/config/DurationDeserializerTest.java

@@ -0,0 +1,20 @@
+package io.kamax.mxisd.test.config;
+
+import static org.junit.Assert.assertEquals;
+
+import io.kamax.mxisd.config.DurationDeserializer;
+import org.junit.Test;
+
+public class DurationDeserializerTest {
+
+    @Test
+    public void durationLoadTest() {
+        DurationDeserializer deserializer = new DurationDeserializer();
+
+        assertEquals(4, deserializer.deserialize("4s"));
+        assertEquals((60 * 60) + 4, deserializer.deserialize("1h 4s"));
+        assertEquals((2 * 60) + 4, deserializer.deserialize("2m 4s"));
+        assertEquals((2 * 60 * 60) + (7 * 60) + 4, deserializer.deserialize("2h 7m 4s"));
+        assertEquals((60 * 60 * 24) + (2 * 60 * 60) + (7 * 60) + 4, deserializer.deserialize("1d 2h 7m 4s"));
+    }
+}