* dropping python-3.5
* fix install guide
* fix setup.py
* fix circleci
* advanced_installation
* index.html
* readme
* pyparsing.py
* remove clean_warning_registry
* 1.13.1 and 1.19.1
* don't use 16.04
* 18.04 libatlas-dev -> libatlas-base-dev
* min pillow version for 3.6 is 4.2.1
* echo commands
* fix conflict, and 32 bit
* fix conflict for circle
* fix scikit-image version dep
* mark tests as xfail on 32bit py3.6
* move to 1.13.3 min numpy version, and simplify old code
* remove the rest of _object_dtype_isnan usages
* Revert "remove the rest of _object_dtype_isnan usages"
This reverts commit c6e867ea1f.
* fix issues raised by jeremy
* minor fix
* minor fixes mentioned by Olivier