currently under development
rvadata2 files are ruby 1.9.2 objects, serialized by Marshal library v4.8
scripts text also compressed by zlib
https://github.com/d9pouces/RubyMarshal - my project is based on this library, i'm changing it to work properly with rvdata2 files
https://github.com/Solistra/rvpacker - from this library i've learned helpful info
https://docs.ruby-lang.org/en/2.2.0/marshal_rdoc.html - ruby marshal documentation, which tells how serialized objects looks on disk