new file:   frustrated_total_internal_reflection.py
Merge branch 'master' into dev
Merge remote-tracking branch 'Berreman4x4/master' into dev
change .gitignore
FTIR description
New examples
Merge branch 'master' into dev
chmod +x
Cleaned reflection-interface.py
Writing improvement
Changed incidence angle
Tiny writing improvement
Bragg2 and FTIR modified
New examples
Merge remote-tracking branch 'Berreman4x4/master' into dev
Cholesteric LC example
chmod +x FTIR-angle-variation.py
Jones and circularly polarized light
Writing improvement
renamed:    Bragg2.py -> validation-Bragg.py