Explore integration test with importer tmpdirs and real db

[cloverich]

Really don't want to spend time on this right now, but there's a bunch of new logic added via markdown files and importer logic (#247 ) that I'm likely to forget and break after. Explore doing a basic set of tests even if run manually that:

• Take some markdown files from a set of directories
• Generate a tmpdir and temporary db for testing
• Run imports and then assert against them

Should limit test logic to preload client level, and ideally can init a separate instance driven by parameters so it can be simply run along-side app without having to change things there and back (or env variables, whatever).