update conftest.py

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branch : iterator-aggregate
write_phar + signature

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branch : phar
cleanup

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branch : phar
some progress

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branch : phar
API change

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branch : phar
some progress?

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branch : phar
remove dead code

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branch : phar
added manifest version

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branch : phar
add_from_string

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branch : phar
added phar readonly configuration value

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branch : phar
some progress

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branch : phar
some progress,  under development

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branch : phar
Do not share the files dict between all instances of PharManifest
fix for changes in unpack() API
fix PharManifest test
Improve phar tests

* make them always work with -A
* use tmpdir, @hippy_fail
* keep artifacts around in the test dirs
* bz2-compress testfilesbz2.phar as intended
(ashfall) A class should not implement Traversable directly