Fixing missing comma in setup.py's classifiers

Temporarily reverting to old AppVeyor image (because new MSVC version…

… fails), and disabling the Travis CI installation of deadsnakes's Python 3.7 (because apt-get fails)

Updating CHANGELOG and bumping version to 0.3.1

Updating CHANGELOG and bumping version to 0.3.0

Updated CHANGELOG and version.h for v0.2.1

Updated README, CHANGELOG and version

Updated README with information on updates and Anaconda, created basi…

…c long_description in ReStructured Text for setup.py, and increased version number to v0.1.1

Adding deploy step using cibuildwheel