Fast-oad

=============
- Bug fixes:
- In a jupyter notebook, each use of a filter in variable viewer caused the display of a new variable viewer. (https://github.com/fast-aircraft-design/FAST-OAD/pull/301)
- Wrong warning message was displayed when an incorrect path was provided for `module_folders` in the configuration file. (https://github.com/fast-aircraft-design/FAST-OAD/pull/303)

=============
- Core software:
- Changes:
- FAST-OAD configuration file is now in YAML format. (https://github.com/fast-aircraft-design/FAST-OAD/pull/277)
- Module declaration are now done using Python decorators directly on registered classes. (https://github.com/fast-aircraft-design/FAST-OAD/pull/259)
- FAST-OAD now supports custom modules as plugins. (https://github.com/fast-aircraft-design/FAST-OAD/pull/266)
- Added "fastoad.loop.wing_position" module for computing wing position from target static margin in MDA. (https://github.com/fast-aircraft-design/FAST-OAD/pull/268)
- NaN values in input data are now detected at computation start. (https://github.com/fast-aircraft-design/FAST-OAD/pull/273)
- Now api.generate_inputs() returns the path of generated file. (https://github.com/fast-aircraft-design/FAST-OAD/pull/254)
- `fastoad list_systems` is now `fastoad list_modules` and shows documentation for OpenMDAO options. (https://github.com/fast-aircraft-design/FAST-OAD/pull/287)
- Connection of OpenMDAO variables can now be done in configuration file. (https://github.com/fast-aircraft-design/FAST-OAD/pull/263)
- More generic code for mass breakdown plots to ease usage for custom weight models. (https://github.com/fast-aircraft-design/FAST-OAD/pull/250)
- DataFile class has been added for convenient interaction with FAST-OAD data files. (https://github.com/fast-aircraft-design/FAST-OAD/pull/293)
- Moved some part of code to private API. What is still public will be kept and maintained. (https://github.com/fast-aircraft-design/FAST-OAD/pull/295)
- Bug fixes:
- FAST-OAD was crashing when mpi4py was installed. (https://github.com/fast-aircraft-design/FAST-OAD/pull/272)
- Output of `fastoad list_variables` can now be redirected in a file. (https://github.com/fast-aircraft-design/FAST-OAD/pull/284)
- Activation of time-step mission computation in tutorial notebook is now functional. (https://github.com/fast-aircraft-design/FAST-OAD/pull/285)
- Variable viewer toolbar now works correctly in JupyterLab. (https://github.com/fast-aircraft-design/FAST-OAD/pull/288)
- N2 diagrams caused a 404 error in notebooks since OpenMDAO 3.7. (https://github.com/fast-aircraft-design/FAST-OAD/pull/289)
- Models:
- Changes:
- A notebook has been added that shows how to compute CeRAS-01 aircraft. (https://github.com/fast-aircraft-design/FAST-OAD/pull/275)
- Unification of performance module. (https://github.com/fast-aircraft-design/FAST-OAD/pull/251)
- Breguet computations are now defined using the mission input file.
- A computed mission can now be integrated or not to the sizing process.
- Better management of speed parameters in Atmosphere class. (https://github.com/fast-aircraft-design/FAST-OAD/pull/281)
- More robust airfoil profile processing. (https://github.com/fast-aircraft-design/FAST-OAD/pull/256)
- Added tuner parameter in computation of compressibility. (https://github.com/fast-aircraft-design/FAST-OAD/pull/258)

==================

- Bug fix: An infinite loop could occur if custom modules were declaring the same variable
several times with different units or default values.

==================

- Added compatibility with OpenMDAO 3.4, which is now the minimum required
version of OpenMDAO. (https://github.com/fast-aircraft-design/FAST-OAD/pull/231)
- Simplified call to VariableViewer. (https://github.com/fast-aircraft-design/FAST-OAD/pull/221)
- Bug fix: model for compressibility drag now takes into account sweep angle
and thickness ratio. (https://github.com/fast-aircraft-design/FAST-OAD/pull/237)
- Bug fix: at installation, minimum version of Scipy is forced to 1.2. (https://github.com/fast-aircraft-design/FAST-OAD/pull/219)
- Bug fix: SpeedChangeSegment class now accepts Mach number as possible target. (https://github.com/fast-aircraft-design/FAST-OAD/pull/234)
- Bug fix: variable "data:weight:aircraft_empty:mass has now "kg" as unit. (https://github.com/fast-aircraft-design/FAST-OAD/pull/236)

==================

- Added compatibility with OpenMDAO 3.3. (https://github.com/fast-aircraft-design/FAST-OAD/pull/210)
- Added computation time in log info. (https://github.com/fast-aircraft-design/FAST-OAD/pull/211)
- Fixed bug in XFOIL input file. (https://github.com/fast-aircraft-design/FAST-OAD/pull/208)
- Fixed bug in copy_resource_folder(). (https://github.com/fast-aircraft-design/FAST-OAD/pull/212)

==================

- Now avoids apparition of numerous deprecation warnings from OpenMDAO.