Update to Semantic UI 2.3, Django 1.11, Cripsy forms 1.7

[acidjunk]

pip package should be aligned with last version of Django/Crispy form.

Some form use formactions, resulting into:
django.template.exceptions.TemplateDoesNotExist: semantic-ui/layout/formactions.html

[monouno]

Hello,
Is this project still under maintenance?

[acidjunk]

PR's welcome. New package will be released when I've some time and when working on a Django project that needs it.