sphinx docs added, pytest module added, bug fixes

dev.ipynb

dev.pyx

dev.pyxbld

docs/Makefile

docs/conf.py

docs/index.rst

docs/make.bat

docs/rst_api_reference.rst

docs/st_sim_api_reference.rst

environment.yml

pytest.ini

requirements.txt

robust_speckle_tracking/bin/beam_calc.c

robust_speckle_tracking/bin/beam_calc.pyx

robust_speckle_tracking/bin/st_utils.c

robust_speckle_tracking/bin/st_utils.pyx

robust_speckle_tracking/config/parameters.ini

robust_speckle_tracking/data_processing.py

robust_speckle_tracking/protocol.py

robust_speckle_tracking/simulation/parameters.py