ISO background handling, better packaging

2.0.3

• readthedocs does not do well with new module names

2.0.2

• splitting monolithic m2.py
• added tests for functions in gaussian.py
• improved docstrings in gaussian.py
• improved module docstrings in m2_fit and m2_display

2.0.1

• trying to get conda release working

2.0.0

• change default background removal to match ISO recommendation
• split monolithic laserbeamsize module in separate modules
• rationalized functions names
• add citation stuff
• add github actions to test and update citation
• improve readme so images work on pypi.org
• add conda-forge support
• update copyright years
• more badges