Flask-bigapp

- updated project structure.
- docs now using sphinx + readthedocs.
- the start of the changes.md file.
- changes to the order of arguments in database configs
- argument 'name' changed to 'database_name' in configs
- addition of abort_status and fail_status args in security decorators

- remove legacy code
- make most packages private make importing flow better

- bug fix: blueprint generation with a url prefix with / would generate //
- version check added to cli

- Fix added to allow working with namespace packages

- Remove default args on ImpBlueprint config

- fix: api_login_check_wrapper return