Variants-CIT

This version only contains optimizations, but touches a lot of low-level code. Please be on the lookout for unexpected behaviour changes.

• In case of conflicting modelParents, modules with the most specific modelPrefix will take priority. Behaviour remains undefined for identical prefixes.
• Reduced log spam in case of conflicting modelParents.
• Modules may now collect assets that have been generated by other modules.
• Modules will no longer collect or generate assets they can't possibly use. (This only affects a handful of module types that require specific syntaxes.)
• Fixed extreme loading times when too many modules crawl through large zip packs. (#87)