Update install kite

Refers to 0.18.0. Changed it so that 0.18.0 is an example, rather than the only form of the command.
I think we need to add the tarball separately, rather than replacing the jar. The jar doesn't work off-cluster, but it also uses cluster dependencies and the public Hadoop API. The tarball includes cdh5.1, so it is CDH-specific and might have problems if there are RPC changes between 5.1 and 5.2. I think that's a good reason to build a version of the tarball for each CDH release, in CDH.