Sqlalchemy utils types

fix The mongoengine example does not work #1865

Use consistent case for func.ST_AsGeoJSON

Simplify example code

Fix bug in mongoengine model converter

Now, no more if statements are used.

Also, this should be more readable, and even faster, as in case of any
False value, the method can return early.

modified:   examples/auth/app.py

As has_role returns a boolean anyway, there is no need for another if-statement.

Allow use custom sqlalchemy __init__ method with required fields

uuid filter implementation

Python 3 compatibility in doc/conf.py

x-editable inline boolean fixes

Fix search placeholder

Added Mongoengine ReferenceField Search And fix MongoImageInput call tabbed

pull master

Fix Csrf Token Missing for file admin delete action