Create Tests for `relic.chunky_formats.dow` Module

[ModernMAK]

Modules requiring tests:

• converter.py
• events.py
• rgd.py
• rml.py
• rsh.py
• rtx.py
• sgb.py
• tmp.py
• whe.py

In common_chunks:

• fbif.py
• imag.py
• image_writer.py
• skel_chunk_nonwhm.py

In fda:

• auto_converter.py
• chunky.py

In sgm:

• obj_writer.py
• sgm.py

In whm

• animation.py
• json_writer.py
• mesh.py
• obj_writer.py
• shared.py
• whm.py

In wtp:

• writer.py
• wtp.py

Sub-Issue of #4