Clarify some setup details in the documentation

[codeslubber]

Would be happy to do this.

I have read through the readme a number of times. The problem is that it seems to be geared toward 2 modalities:

• wrap this around all tests, and thus have it auto start/stop on every test
• or do it manually with sbt, using commands

I am fond of doing TDD inside IntelliJ with ScalaTest. I would prefer to have a way to either make my own test class that stops/starts/seeds the database, or use one of the many ScalaTest fixture mechanisms to do same.

Thanks, this is cool.