moved DummyMod to proper namespace to enable pickling
Revert "converted multi-context with-statements to nested (2.6 compatibility)"

This reverts commit 311acdf45e9d164ac3dd3eb72b913dfc7d7e4314.
always fire LOCAL_IPS.extend(PUBLIC_IPS)

was in `else`, but should have been `finally` so it aways runs.


Symptom was warnings in parallel.client about `127.0.1.1` not being this machine.
update version-check message in setup.py and IPython.__init__

clearer message that IPython no longer supports 2.6.
update Python version classifiers:

- drop specific 3.x
- drop 2.6
update README with dropped 2.6 and 3.2 support

also clarify the checkout steps in development install
Use Instance trait for user_ns instead of Dict.

Instance(dict) is None by default, unlike Dict().
Add a test for kernel started without user_ns kwarg.

user_module should not be an instance of DummyMod
Merge pull request #4189 from minrk/localinterfaces-finally

always fire LOCAL_IPS.extend(PUBLIC_IPS)
Merge pull request #4188 from takluyver/dict-traitlet-none

Allow user_ns trait to be None

The Dict trait converts None to an empty dict, which caused the application to pass in a user_ns to the shell, which then behaves slightly differently, creating a DummyMod instance.
1.1 backport stats
don't upload to GitHub in release script

GitHub doesn't have an API for it at the moment
append Firefox overflow-x fix
Merge pull request #4190 from minrk/byebye2.6

update version-check message in setup.py and IPython.__init__

clearer message that IPython no longer supports 2.6.
Added top level convert class, updated init.py to load v#s
added undoc and made DummyMod doc more reflective of context
Merge pull request #4186 from mmckerns/master

moved DummyMod to proper namespace to enable dill pickling
Notebook version conversions done right?
Fixes (iptest), simplified v1, v2, .. , vX import code
enable cython highlight in notebook