BS3 radio-inline

Change in css class
Checkbox for BS3 does not require form-control class
Fixed checkbox for BS3
Merge branch 'dev' of github.com:mrkre/django-crispy-forms into dev

Conflicts:
	crispy_forms/templatetags/crispy_forms_field.py
Adjusting checkboxselectmultiple for Bootstrap3

Related to #225
Updated CHANGELOG and CONTRIBUTORS