add main configuration and user-defined log4j configuration on
Jersey-Spring sample.
Merge branch 'master' of https://github.com/3rdstage/exercise.git

Conflicts:
	thirdstage.exercise.spring3/pom.xml
	thirdstage.exercise.spring3/src/main/java/thirdstage/exercise/jersey/spring3/Application.java
	thirdstage.exercise.spring3/src/main/java/thirdstage/exercise/jersey/spring3/JerseySpringServlet.java
	thirdstage.exercise.spring3/src/main/resources/thirdstage/exercise/jersey/spring3/config.properties