updated to ribbon 2.0-RC9

@dsyer I've upgraded to ribbon 2.0.  All seems to be backwards compatible.  It gives you a nice LoadBalancerBuilder (https://github.com/Netflix/ribbon/blob/master/ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/LoadBalancerBuilder.java) that may be useful for the stuff you were just doing.

The only thing I can't seem to get working is the cust-stores ui (the zuul proxy is broken).  It can't find CommonClientConfigKey.NIWSServerListClassName and I'm having trouble figuring out how to get cli to see have the right dependency.

I rebuilt the cli jar and now I get this exception:

    Caused by: java.lang.NoClassDefFoundError: org/springframework/security/crypto/encrypt/TextEncryptor
	at org.springframework.cloud.cli.command.encrypt.EncryptCommand.<init>(EncryptCommand.java:34)
	at org.springframework.cloud.cli.command.CloudCommandFactory.getCommands(CloudCommandFactory.java:34)
	at org.springframework.boot.cli.SpringCli.addServiceLoaderCommands(SpringCli.java:62)
	at org.springframework.boot.cli.SpringCli.main(SpringCli.java:45)
	... 6 more