Spring configuration clean-up

* Regrouped component definitions into one single file per package in
most cases, with a few exceptions

* Added documentation about how the configuration is stored and which
guidelines should be followed when adding or modifying Spring component
configurations.

legacyworlds-server-beans-mailer/src/main/resources/configuration/mailer/mailer-bean.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans"
-                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-                xsi:schemaLocation="
-                        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
-
-	<!-- Mailer bean - all properties autowired or defaulted -->
-	<bean id="mailer" class="com.deepclone.lw.beans.mailer.MailerBean" />
-
-</beans>

legacyworlds-server-beans-mailer/src/main/resources/configuration/meta/mailer.xml

@@ -2,9 +2,9 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="
-                        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
+                        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
 
-	<import resource="mailer/mailer-bean.xml" />
+	<bean id="mailer" class="com.deepclone.lw.beans.mailer.MailerBean" />
 	<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
 		<property name="host" value="127.0.0.1" />
 	</bean>