Square-database-structure

- add testing framework.

- replace force_recreate_tables optional param to drop_if_exists.

- remove app raspi_home inside square->public->app.
- remove app_id column from square->greeting->greeting.

**Full Changelog**: https://github.com/thepmsquare/square_database_structure/compare/1.3.3...1.3.4

- add new app raspi_home inside square->public->app.
- add new schema square->greeting with 1 table Greeting.

**Full Changelog**: https://github.com/thepmsquare/square_database_structure/compare/1.3.2...1.3.3

- update to versioning plan.
- add test app in square->public->app.

- update license in setup.py

**Full Changelog**: https://github.com/thepmsquare/square_database_structure/compare/1.3.0...1.3.1