Flask-appbuilder

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- Fix, Index view override on class instantiation is discarded

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- Fix, 993 App factory pattern, AppBuilder object can be fully configured using config keys
- Fix, 994 If builtin role don't check db also, higher permission on DB would allow access

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- Fix, 991 Make Admin builtin optional, only if declared on config

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- New, 977 flask-sqlalchemy bump to 2.4.0 (new config options)
- New, 986 Builtin roles using regex, Admin role is now one of these
- New, 969 Override class and method permission names and procedure to converge/migrate
- Fix, 985 Deprecation warning EOL version was wrong
- New, 976 pRison version bump
- Fix, 966 Change the default email value for auth_remote_user in security manager

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- BREAKING CHANGES, Python 3.6+ is now required
- Fix, 951 M-M fields are always required, now they default to not required with optional required flag on col info dict
- Fix, 885 list view ordering problem of related model with dotted notation, fixes 884
- Fix, 946 Factory app pattern
- (DEPRECATION) New, command line integrated with Flask cli, fabmanager is deprecated and will be removed on 1.16.X
- New, config key, FAB_SECURITY_MANAGER_CLASS to declare custom SecurityManager classes.
- New, sub command 'create-permissions' to create all permissions when update_perms is False.
- New, config key, FAB_UPDATE_PERMS to flag FAB to update or not update permissions.
- Fix, 955 Find permission view menu superset issue 1944
- Fix, new version location, removed deprecated imp package from setup

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- New, CRUD RESTful API and custom API