* ds1 refactor: added test fore some methods; put tests in right order
* ds1 refactor: unit tests for all methods
* ds1 refactor: fixed build errors
* ds1 refactor: lintfix
* ds1 refactor: fixed bug with SetWidth, SetHeight methods
* ds1 refactor: rename tile_record.go -> tile.go
* ds1 refactor: unit test for SetTiles
Co-authored-by: M. Sz <mszeptuch@protonmail.com>
