Update to work with Sage 6.0

(actually, I think these changes are needed for Sage 5.10 or later)

Contains a backport of a workaround needed so the code works on Cytho…

…n > 0.17.1 or so (and hence >Sage 5.6 or so).

I missed a Zq->Zq_compute renaming in commit cd2a1d7

Thanks to Leslie Hogben for reporting this bug.

update readme to point to version 1.1.0

Version 1.0.0