Can tabtabtabLeagacy be incorporated cleanly?

[dbr]

Dylan has made tabtabtab work in 6.2... I wonder if the compatibility layer be refactored into a separate tabtabtab_legacy module, which doesn't duplicate the contents - then people could do something like:

curl -O http://.../tabtabtab.py
curl -O http://.../tabtabtab_legacy.py

Then:

if nuke_version < 6.3:
    import tabtabtab_legacy as ttt
else:
    import tabtabtab as ttt
# ...