[skeleton] drop whitelist_externals for flake8
whitelist_externals makes sense when used with sitepackages=true.
In this case it will always rely on $VIRTUAL_ENV/bin/flake8 so, the
whitelist_externals has no effect.
Tutorials
~~~~~~~~~
We present a few tutorials of different levels. The blog building
tutorial introduces one smoothly to the basic concepts.
Then there is a photo gallery construction tutorial which highlights
more advanced concepts such as unit tests, security settings,
migration scripts.
.. toctree::
:maxdepth: 1
base/index
advanced/index
tools/windmill.rst
textreports/index
dataimport/index