ShardingNode: some log printing was added
ShardingNode: isRunning flag is now cleared in case of successful node termination
RouterCommunicationException was introduced. It's thrown when communication with node fails somewhy.
pom.xml: minimal java version was raised to 1.7
Merge branch 'master' into devel

Conflicts:
	src/main/java/net/yeputons/cscenter/dbfall2013/scaling/Router.java
	src/main/java/net/yeputons/cscenter/dbfall2013/scaling/ShardingNode.java
Now java.net.URI is used instead of com.sun....Uri. It needs host to be specified in URI, but is not java version-dependent.