Implemented player DAO with jooq.
Implemented Unit of Work pattern for the Jooq DAOs.

- Added Dropwizards liquibase module, this enables the liquibase CLI commands.
- We are using Dropwizards connection pooling in the storage layer.
- Renamed migration.xml so that the liquibase CLI command finds the migration file.
Fixed HACKING document.
Moved Jooq classes.
Fixed build.
Removed the Unit of Work from PlayerDAO and PlayerService.

- The current unit of work is now stored in a thread local. Each DAO which needs the unit of work can call UnitOfWorkService.getCurrent() to obtain the current unit of work.
Better unit of work handling in the JOOQ DAOs.
Implemented JooqPlanetDAO.
Moved the unit of work handling into an RequestDispatcher.
Implemented JooqBuildingDAO.
Starting a unit of work in the clock.
Implemented JooqConstructionSiteDAO.
Added technology and research tables to migrations script.
Implemented jOOQ research and technology DAO.
Implemented jOOQ ship in construction DAO.
Implemented jOOQ hangar DAO.
Refactored round management in a DAO.
Implemented jOOQ round DAO.
Added flight tables.
Started to implement jOOQ flight DAO.