update docs for type checking availability 
update docs for type checking availability 
alendit/django-json-rpc,J3173/django-json-rpc,palfrey/django-json-rpc,samuraisam/django-json-rpc,coxmediagroup/django-json-rpc,samuraisam/django-json-rpc,estin/django-json-rpc,J3173/django-json-rpc,estin/django-json-rpc,Inter-Actief/django-json-rpc,alendit/django-json-rpc,Inter-Actief/django-json-rpc,coxmediagroup/django-json-rpc