This commit uses all our new ways of doing things to Lock Sessions and their interactions with KV and Nodes. This is mostly around are new under-the-hood things, but also I took the opportunity to upgrade some of the CSS to reuse some of our CSS utils that have been made over the past few months (%csv-list and %horizontal-kv-list).
Also added (and worked on existing) documentation for Lock Session related components.
John Cowen