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

This reverts commit 311acdf45e9d164ac3dd3eb72b913dfc7d7e4314.
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
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 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
remove executable flag on soem files
Split exporter in to for ipynb->ipynb
some trailing whitespace
import baseexporter in init
Exporter -> TemplateExporter / BaseExporter
fix 1 test
renamed:    exporter.py -> template_exporter.py
renamed:    baseexporter.py -> exporter.py
renamed:    template_exporter.py -> templateexporter.py
Rebase changes made by hand
Check if class is an instance of Exporter, not TemplateExporter