More overrides and exclusions for 7th Plague.

[kernelmethod]

• Add article override for girshling fangs
• Add displayname overrides for the different variants of girshling creshes.
• Add exclusions for still gyre wights (and their uplifted sub-variants).

[kernelmethod]

Not ready to merge quite yet, just wanted to keep you up-to-date with some of updates I'm making.

[kernelmethod]

Should be ready to merge now.