update pynac to 0.2.2

[burcin]

Here is the long awaited pynac update. It includes patches from upstream (ginac) which fix Sage bugs and should be easy to review.

​http://sage.math.washington.edu/home/burcin/pynac/pynac-0.2.2.spkg

This package fixes #9891, #9947 and #8943. Attached patch also adds some more doctests to the Sage library.

I hope this can get reviewed and merged soon. There will be an new release with more substantial changes like #9880.

[kcrisman]

This is fine too. Notice that there is a typo in the Ginac upstream.

static ex tanh_conjugate(const ex & x)
{
	// conjugate(tan(x))==tan(conjugate(x))
	return tanh(x.conjugate());
}

The method is correct, but the doc says tan, not tanh.

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As for the other things, they are nearly all compiler improvements. I'll just check these work on sage.math, but otherwise looks good to go.

[kcrisman]

Good to go. Thank you so much for keeping up with this, Burcin!