conftest.py s/b moved to pysaunter egg if possible about py.saunter

[adamgoucher]

So the way py.test works is it loads magically named files (conftest.py for instance) into scope for that directory and below. Which has the side effect of having to be in $PYSAUNTER_ROOT in this case. (You could also, if you had something specific to say scripts/a/b/c/*.py have another one there as well.) This more or less means it cannot just live inside the egg.

The inclusion of the contents of this file are also why I don't auto-upgrade its contents when a change is made to it but instead just document what is necessary in the release notes. There is another change coming for it, but that is only for WebDriver [for now]. But after that I really hope it doesn't change much.