Fixed an typo issue
fix: active class is added several times, and to several tabs
Access keys() for both dict and RequesContext
Merge branch 'patch-1' of git://github.com/mozillazg/django-crispy-forms into dev
Merge branch 'fix_tab_active' of git://github.com/chrisv2/django-crispy-forms into dev

Conflicts:
	crispy_forms/tests/tests.py
Updating CHANGELOG and CONTRIBUTORS
Bumping version to 1.2.6