direction to study the src

[YouPeng Yang]

Hi all

   Glad to get the the release of the Milestone 1.
    I have already studied the two docs of ApacheDrillPlanSyntax and Value
Vectors.
 and translate them to Chinese ,also  post them in my blog to help  users
in china.
    Next step,I want to study the src code , would you please light me how
to study the drill src code.


Regards