Remove the TZ from the baseline, because it was causing an error when loading fixtures into a test database.
Moved Nowhere and Everywhere into initial_data because Room has a callable default, and the test database had problems because only the default fixture gets loaded.
Fix bug: if nothing at all has been scheduled, we get an error for the number of scheduled hours on the main page.
Fix bug: more cases where the main page doesn't have useful data in it if there aren't any scheduled items.
Get rid of the example test. Add some base classes to use which provide some utilities for testing common things. Populate some basic tests for an "empty" database (one with all the defaults, but no people, items or tags, and only the default rooms).

Also add some notes on testing, and another enhancement suggestion from EightSquared.
A slightly modified version of reload_streampunk.sh, that doesn't do the reload of test data. Should really just make this an option to reload_streampunk.sh, but I was in a hurry on the bus...