Automatic map pattern enforcement
Some mods use normal (height)/(terrain) specular maps but do not follow the standard patterns specified in the OpenMW documentation.
Some of these mods will also need to have their meshes fixed if they contained references to the textures (see #42 (closed)).
This can basically be implemented using a RENAME field that takes a string substitution pair, or list of pairs, and applies the substitution to any filenames matching the pattern, renaming them to the resulting string.
Issue: How to specify case (in)sensitivity?
e.g.
RENAME=[(r"_nm.dds$", "_n.dds")]
This should be available on individual Install Dirs, and possibly also as a class variable to apply to all files in the work directory.
Should be applied as part of the default src_prepare function.