Our test suite mostly passes when run with pytest-xdist parallelization, giving a pretty nice speed boost.
However there are just a couple places where tests try to reuse the same temp file and step on each others' toes. This can be avoided by --dist=loadscope but that seems a bit fragile and is one more thing to remember.

I know that we can also parallelize using stestr but that is probably

We need to create a Q.History documentation page that is similar in nature to the existing Q class documentation pages. See Q-ComplexNumber.html as an example.

Update installation docs in the /docs folder and on the readme.md

It would be convenient to have a method is_reversible in gate_base which returns true for reversible gates, whose unitary operation is a permutation matrix.