Increment snapshot version from 3.3 => 4.0
Increment snapshot version from 3.3 => 4.0

See http://blog.springsource.org/2013/01/16/next-stop-spring-framework-4-0
for details.

spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework