Added individual song and service pages.

src/main/groovy/com/jdbernard/nlsongs/model/ServiceType.java

@@ -1,3 +1,11 @@
 package com.jdbernard.nlsongs.model;
 
-public enum ServiceType { SUN_AM, SUN_PM, WED }
+public enum ServiceType {
+    SUN_AM("Sunday AM"), SUN_PM("Sunday PM"), WED("Wednesday");
+    
+    private String displayName;
+
+    ServiceType(String displayName) { this.displayName = displayName; }
+
+    @Override public String toString() { return this.displayName; }
+}