- use the standard paginator.validate_number method rather
strict_postive_int.
- support optional paginator method, default_page_number, to get the default
page number rather than hard-coding it to 1
- this allows supporting non-integer based pagination which can be an
important performance tweak on extermely large datasets or high request
loads
- relatively thorough unit tests of the changes
On skip of django_filters related unit-tests the reason given states the Python package 'django-filters' is not install.
However, the Python package required to run django_filters related tests is 'django-filter'.
