fix docs link references
fix docs link references

All http://drfdocs.com/docs/* now are pointing to  http://drfdocs.com/ instead of page not found
ekonstantinidis/django-rest-framework-docs,manosim/django-rest-framework-docs,manosim/django-rest-framework-docs,ekonstantinidis/django-rest-framework-docs,ekonstantinidis/django-rest-framework-docs,manosim/django-rest-framework-docs