** Add locale english and chinese **

1) create two locale message properties files,
message_{locale}.properties and store them under the classpath

2) in the spring context file, add ResourceBundleSourceMessage to 
specify where to store messages

3) add localeResolver to specify where to store and find the current
locale information.. you can you SessionLocaleResolver or
CookieLocaleResolver. They use different place to store the lcoale
information. Can have others

4) add localeInterceptor to change the current locale by use the input
parameter for the interceptor