Organize the code like a real program, and start parsing options.
Organize the code like a real program, and start parsing options.

* tools/dev/contribulyze.py: Import getopt.
  (process_committers): New function, to process new -C option value.
  (drop): New function, contains what used to be top-level code.
  (main): New function, just parses options then calls graze() and drop().


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@856051 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion