Rename files, preparation for upcoming separation
Add missing string (all files)
Rework english locale file

Separate config strings from everything else so it doesn't get loaded into memory until it's necessary.
Work on the rest of the files will follow eventually
Remove 2 unused strings (all files)
Merge branch 'master' of github.com:Blazeflack/ElvUI-Locales

Conflicts:
	russian_config.lua