adjusted signup/signin partials on landing page
fixed merge conflict
user can submit a question via the navbar's modal. doesnt work with image uploads yet :(
Question now submits using form_tag instead of form_for, thus making all the instances of @new_question unneccesary
Updated signup/signin partials to have placeholders and use a form_tag
Removed unneccesary instances of question and user from respective controllers that were needed for the form_for tags (now removed)
fixed merge conflict