Cyrillic Core and Plus: local variant glyps added

[vv-monsalve]

Hi @yanone, as we discussed on Friday, I'm updating the Cyrillic Core and Plus definitions, adding the local variants, and taking the entire "Italic" lists in #237.

[vv-monsalve]

@yanone said in chat communication:

I will build on this existing structural rewrite to generate additional dynamic glyphsets for the Roman and Italic localized variants for Cyrillic. They must be separated into Roman and Italic, otherwise it's too confusing for people who are not knowledgeable enough in the Cyrillic matter.