Render infantry units C&C style

[stefanhendriks]

Soldiers

This should be like C&C , and not like the original Dune 2 where you have either 1 or 3 units at one cell. C&C handles infantry 5 at one cell at max.

Possibly builds upon #25

Acceptance Criteria:

• [ ] Can place up to 5 infantry units on one cell
• [ ] Have different facings

This may look like a trivial thing to build, but it is not. It would be best to have other units drawing working before going to this one. (/cc @arjenvanderende )