unicode NFC

[niccokunzmann]

The properies like .summary return unicode.
I had a PR to the Open Web Calendar that helps with displaying Unicode text, normalizing the unicode values of the icalendar attributes.

unicodedata.normalize("NFC", string)

My improvement idea for greater compatibility:

• list all properties that return text
• decide which of these properties would benefit from Unicode normalization.
• add Unicode normalization to those attributes

See also:

• Fix diacritics corruption by applying NFC normalization-Issue #946 niccokunzmann/open-web-calendar#1022

If you have an issue with this or already used NFC, please let me know.