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(but since it is not important, use distutils when setuptools is
unavailable)

also remove old stuff from the default config

(no idea why this is appearing now)

- todo: write a common import file to avoid duplicating the imports

- add a get_tabs(cls) method to avoid manual filtering
- move some stuff to avoid cyclic dependency hell between tab classes

sort the configurations options by theme
make the sidebar fixed

When the connection lags and the user presses tab,
poezio will insert a tab inside the input, wich has now
a specific formatting. This caused poezio to crash.

ssl page (img & ref)
theming (compile errors, format and typos)

And put reasonable defaults

Add a force_encryption option set to true by default.

-stable sleekxmpp
-new dnspython
-new sphinx

- Replace tabulations in the input by highlighted “t”s
- More readable, and less messy to deal with.