Update dependencies:
spring 4.0.5 -> 4.0.5: https://jira.spring.io/secure/ReleaseNote.jspa?projectId=10000&version=14629
commons-logging 1.1.3 -> 1.2: http://commons.apache.org/proper/commons-logging/RELEASE-NOTES.txt
findbugs 2.0.3 -> 3.0.0: http://findbugs.sourceforge.net/#changes