[docs] Update changelog and bump version to 1.2.2

onwards

[travis] Use build matrix to run tests on python 3.7

Following https://github.com/di/gunicorn/blob/9c3f2b8287dad40288746a43d2ab7b8ef3ec2273/.travis.yml
use xenial distribution on which Python 3.7 works

[docs] Fix day

[version] Bump to 1.1

[version] 1.0.3

[docs] Enter today's year automatically

[cmake] Use GALARIO_CHECK_CUDA

Interface is a bit more consistent from the user perspective

[pyx] Use f_max f_min only where needed, ie get_image_size

[zenodo] Update zenodo json

[zenodo] Add zenodo json