v0.5.0
    add symbolic routines
    add more mueller functions
    rename some stuff
    modify names for polarization ellipse
    improve readme
    split visualization into separate document
    
v0.3.1
     hopefully fix packaging
     fix phase for TIR of dielectrics

v0.3.0
     add basic routines for Mueller and Stokes vectors
     rename a bunch of routines
     repackage with the intent that modules will be used separately
     add Jupyter notebooks to provide basic documentation
     add basic ellipsometry support
     
v0.2.0
     add Fresnel transmission
     handle total internal reflection better
     
v0.1.1
     fix packaging error
     
v0.1.0
     initial checkin
