Hi devs,

For myself and new contributors, I drew overview pictures about GHC development flow.

  GHC development flow

    http://takenobu-hs.github.io/downloads/ghc_development_flow.pdf

    https://github.com/takenobu-hs/ghc-development-flow

If I misunderstood something, please teach me.

I'll correct or remove them.

Regards,

Takenobu