Update dependency on test.generative to 0.5.0
Git-ignore .nrepl-port
Update dependencies on Datomic and test.generative
Add doc
Define a protocol for services to follow.

- Replace multimethods for start and finalize
- Convert action log to an instance of the protocol.
Updated tag in pom.xml
Add ProcessStateService

- add ConnectionVendor protocol with sim/connect fn
- add ProcessStateService record which implements ConnectionVendor
- get a datomic db connection via sim/connect
Be clear that we don't use arguments for the in-memory process database
Merge branch 'master' of github.com:Datomic/simulant
Merge branch 'process-state-for-pull-request' of https://github.com/relevance/simulant into relevance-process-state-for-pull-request

Conflicts:
	pom.xml