Expand the README
Expand the README

Added info on what I based this off, and some more elaborate instructions.

neverfox/chestnut,Jobava/chestnut,neverfox/chestnut,Jobava/chestnut,plexus/chestnut,jacqt/chestnut,Nek/chestnut,Nek/chestnut,plexus/chestnut,malloryerik/chestnut,malloryerik/chestnut,malloryerik/chestnut,Jobava/chestnut,Nek/chestnut,jacqt/chestnut,neverfox/chestnut