X, Y, Z axes were not in the right-hand orientation and the
Z-stack for drawing axes was not updated resulting in strange
graphical output (axis could "jump" over another instead of being
drawn behind)
The version is now not hardcoded anymore in the python module. We use
setuptools_scm or pkg_resources instead.
There was also a bug in the linkage for PED with matrix inversion using
external lapack.
Finally, the install script install now requirements and all requirements
are stored in the requirements.txt file. setup.py looks inside to set its
"install_requires" keyword.
The PED spectroscopy by the matrix inversion algorithm is now
included.
This commit also includes:
* some changes in default values in parameters.py for eigval_ipwm, eigval_method
in SpecParameters and phi in SourceParameters
* a modification in the cluster viewer: the mouse wheel allows to change the
transparency and see the emitter
* in utils.py, the hemispherical_cluster function has a new keyword that allows
to create cylindrical clusters