Update README.md

Renamed a test

Adjusted the test crystal parameters

Added tests for strain and stress tensor consistency

fixed typoed coordinate matrix names and sigma_xy in anisotropic_circular()

Added lateral stress components in cartesian coordinates for anisotropic circular wafer

Added lateral strain components in polar coordinates for isotropic circular wafer

Added lateral strain components in cartesian coordinates for isotropic circular wafer

Added missing functionality to compute_resolution_function() and fixed bugs in input validation

Fixed syntax error

Implemented rectangular crystal to the Analyser class

Added rectangular wafer deformation field

Modified test imports

Added the Analyser class to be imported into the main module

Fixed the import paths