Evaluate new Datomic changes

[rnewman]

In particular:

Tempids and explicit partitions are now optional, simplifying code for the many programs that do not care about them.
Schema install and update are now implicit, and do not require explicit :db.install/attribute or :db.update/attribute datoms.

More: http://blog.datomic.com/2016/11/datomic-update-client-api-unlimited.html

and

http://docs.datomic.com/schema.html#explicit-schema

[rnewman]

This release of Datomic comes with a simple remote client API. It looks like they ran into the round-trip tempid problem, given the last sentence in this bit:

Starting with the current release of Datomic:

• tempids are optional
• when you need a tempid to coordinate the relationship between two entities, you can use an ordinary string instead of a tempid structure, and that string can be meaningful to readers of your code
• the existing tempid data structure and API continue to be supported unchanged. Use them if you want them.

Clients will support string tempids only.