Old version docs and migration

[lsbrucelincoln]

Thanks for your hard working!
So happy to see the version 1.0.0.
We plan to migrate to the new version. And we are a UI framework team in a company that make some modification (mainly styles and more types of fields for developers in our company).
I want to know how I can get the old document or a migration document so that I can check all the difference before the v 1.0.0 and the version we now use (0.25.4) .
Thank again for your great work.