adding python 3.6 builds to appveyor as per #184 (#186)
adding python 3.6 builds to appveyor as per #184 (#186)

* adding python 3.6 builds to appveyor as per #184

* updating line in appveyor yaml to use a more recent conda version

* fixing typo in py3.6 32bit matrix

AndrewAnnex/SpiceyPy,drbitboy/SpiceyPy,michaelaye/SpiceyPy