Moved the traitlets based config to sandbox (created it).

Stefan's prototype new config system that is based on ideas from
traits, depended on Python 2.5.  We have not done a thorough code
review of this code and I don't think we are even using it yet.

I have moved all the code from IPython.config to the top-level
sandbox.  I have begun to remove all references to these modules
(just a few imports), but I still need to do lots of testing
to make sure there are no lurking problems.

IPython/config/api.py

@@ -21,10 +21,6 b' from os.path import join as pjoin'
 from IPython.genutils import get_home_dir, get_ipython_dir
 from IPython.external.configobj import ConfigObj
 
-# Traitlets config imports
-# from IPython.config import traitlets
-# from IPython.config.config import *
-# from traitlets import *
 
 class ConfigObjManager(object):