Adding preview question template for new questions.
Adding a url pattern for preview questions view. PEP-8 Corrections.
/templates/stack/add.html should call to preview question view and also de submit button has been changed according to it.
Adding condition to show the Post button only if the user has already used the preview function and it's a valid question.
Adding preview question view, also modified add view to redirect to preview question view. A user must be authenticated to make a Question, so I added a condition to check that. Finally some PEP-8 corrections.
Removing ipdb import line...
Removing non existent template tags for stack.
Using login_required decorator. Cleaned add view logic. Unified if blocks into one when the 'preview' is into request.POST.
Adding prefix 'question' to parse the data into the form from the add view.
Removing template tags from stack/preview.html
The comment instance is not created when it's only a preview. Changed also the context to render the preview template.
Comment instance is not there anymore. Also the template tags were removed.
Merge pull request #1 from fedexcastro/preview_page_for_new_questions

Preview page for new questions