Merge branch 'dev0' into dev-maxwell

.gitignore

dev.html

dev.pxd

dev.pyx

dev.pyxbld

docs/conf.py

docs/reference/st_params_ref.rst

pyrost/bin/beam_calc.html

pyrost/bin/beam_calc.pxd

pyrost/bin/beam_calc.pyx

pyrost/bin/st_utils.html

pyrost/bin/st_utils.pyx

pyrost/config/parameters.ini

pyrost/data/atom_data.npz

pyrost/data/brco_f1f2.npz

pyrost/data/chantler_f1f2.npz

pyrost/data/henke_f0.npz

pyrost/data/henke_f1f2.npz

pyrost/data_processing.py

pyrost/include/st_gaussian.c