modal-login: Modal login dialog using a nice drawer. Login requests now use AJAX + json
Users.views: Place jsonify on same line as other flask imports.
Requirements.txt: Add wtforms_json.
Fixed some (swear-word because @brotatos doesn't swaring) that was missing
Forms: Fix @jhladky's (insert swear word for excrement here).
Merge modal-login (#70) into master

modal-login: Modal login dialog using a nice drawer.

Login requests now use AJAX + json