Merge pull request #364 from petrus-jvrensburg/examples

Examples
Update auth.py

login_manager.setup_app(app) is deprecated
login_manager.init_app(app) is the recommended way

see https://flask-login.readthedocs.org/en/latest/#flask.ext.login.LoginManager.setup_app
Merge pull request #367 from jabbalaci/patch-1

Update auth.py
form.js - make fieldConverters usable
Merge pull request #368 from bergundy/master

form.js - make fieldConverters usable
Only replace MongoDB Image if a new one is submitted
Merge pull request #370 from BendingSpoons/master

Fix counterintuitive editing of MongoDB Documents with ImageField
Make 'forms' example deployable.
Make 'auth' example deployable.