Add generic SQL code for database tables
Initial code to add players to the database

- Sets up the game-data database as an H2 db
- Adds code to add players
- Adds test code.
Add utility functions as a separate namespace

- take averages (crappy algorithm)
- calculate deadlines given an event's duration
Add simple function to mock passing messages to players
Add function to make a player eligible for a punk show
Add a boatload of functionality for adding sitters and bosses

This is a huge dump of code, sorry (none of the original intermediate
commits worked in any way, so they've been squashed.) This adds functions
that put sitters and bosses in the labor pool and automatically match
them up if their wages align. It also adds some test code that verifies
the right things happen in a very simple test database.