use bit_chain's not pointers.
use the r2004 decompressor.
use fields, not hand-written getters.
Refactor decode_r2007 to use normal 2004 methods
This is a GitHub Issue
repo:libredwg
owner:LibreDWG
Title : Refactor decode_r2007 to use normal 2004 methods
Issue date:

--- start body ---
use bit_chain's not pointers.
use the r2004 decompressor.
use fields, not hand-written getters.
--- end body ---
