Xaspy

minor updates:
- typo fix in `mHYST()` in `xas.polarized`
- introduce helper function `center()` in ´utils`
- update `split.py` for SPEC file separation
- remove linters in code with .flake8

**Full Changelog**: https://github.com/gnzng/xaspy/compare/v0.3.1...v0.3.2

optimized for BL6.3.1 + fixed typos

pre0.3.0_2
updated Traj and Sig Scan Classes
Beam line computer and local paths can now be used
introduced file path indexing for beam line computer -> file paths will be stored as pickle files


pre0.3.0_1
'pre0.3.0_1' on extra branch

-> test if possible to install package from github

**Full Changelog**: https://github.com/gnzng/xaspy/compare/0.1.12...v0.2.1

new release with additional spin to orbit ratio function for 3d and 4f systems, and group class to store spectra

new in XMCD function: energy shift can be implemented between the two different polarizations

log error fix in XMCD function for transmission experiments

new function mHYST for Hysteresis loops measured via polarized x-rays
- developed for many (mHYST) loops in one file
- function counts loops and separates
- averaging possible