Qbirthday

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- Add license to wheel file
- Fix Lightning backend (thunderbird profile directory location)

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- Rename as QBirthday
- Use Python3
- Use PyQt
- Remove pynotify notifications
- Remove "add" feature
- Remove Sundbird/Iceowl backend
- Replace Makefile with Setuptools setup.py
- CSV file delimiter configurable and must be consistent in the whole file
- Drop all translation files since translation is now based on Qt.
It should be possible to migrate old translation files but most strings were
changed in the code anyway.
- Add French translation.

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- Fix to minor fix in last release...

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- Minor fixes related to installation

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- Remove Evolution as supported DB

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- Fix bug if two birthdates same D-M different Y
- Fix bug in .ics export (UID must be unique)
- Translation updates: Cesky, Italian, French
- Tarball generation improvement in Makefile