Probeye

Added
- added probeye header-file 'probeye.txt'
- added loguru dependency
Changed
- changed various print-commands to logging-commands using loguru

Added
- Added ScipySolver-class which provides a maximum likelihood solver
Changed
- restructured solver routines for emcee and pyro to methods of corresponding solver-classes

Changed
- computation of Jacobian reshaped from 3d to 2d array
- corresponding modifications in pyro-solver
- adopted corresponding tests

Added
- torch submodule (in inference submodule)
- arviz-based post-processing for sampling methods (in postprocessing submodule)
- integration test with a correlation example
- new subroutines: flatten_generator, flatten, process_spatial_coordinates, translate_prms_def
- new script: correlation_models.py in inference/emcee module
- general plot-method in PriorBase
Changed
- tool-independent noise model (in definition submodule)
- tool-independent normal noise model (in definition submodule)
- normal noise model for emcee (revised to be able to account for correlation)

Changed
- InferenceProblem class
* One can now add latent parameters without explicitly defining a prior. When not stated, the prior will be assumed to be uninformative. The shortest way to do so is by: problem.add_parameter('a', 'model') for example. This is aiming at maximum likelihood problems, where no priors need to be defined.
* Removed independent '_priors'-attribute. It is now dynamically derived from the '_parameters'-attribute. By that, the priors are not stored at two locations anymore. The only place where a prior is stored now is the 'prior'-attribute of the corresponding parameter.
* Added parameter-consistency checks in the method check_problem_consistency.
* Removed private _add_prior-method. The adding of a prior is now done directly in the add_parameter method.
* Removed add_prior-test in test_inference_problem.py.
* Moved most code of add_parameter-method to Parameters-class.
- ParameterProperties class
* Removed '_role'-attribute. There is still a 'role'-property, which is derived from the '_index'-attribute.
* Added 'changed_copy'-method for writing on the private attributes.
* Added method check_consistency.
* Added corresponding tests in test_parameter.py.

Changed (1 item)
- Sensor class:
* Combined with PositionSensor. Now, the basic Sensor class provides the option to define sensor coordinates.
Removed (1 item)
- PositionSensor class
* Removal due to merge with the basic Sensor class.
Added (1 item)
- Changelog
* Added CHANGELOG.md to repository.