Add config initialization with a map of config items

src/main/java/envoy/data/Config.java

@@ -61,6 +61,14 @@ public class Config {
 				} else throw new EnvoyException("Malformed command line argument at position " + i);
 	}
 
+	/**
+	 * Initializes config items from a map.
+	 * 
+	 * @param items the items to include in this config
+	 * @since Envoy Common v0.1-beta
+	 */
+	public void load(Map<String, ConfigItem<?>> items) { this.items.putAll(items); }
+
 	/**
 	 * @return {@code true} if all mandatory config items are initialized
 	 * @since Envoy Common v0.1-beta