Changelog:
===========
- Community wanted: Reintroduce 7 as DayOfWeek in deviation from standard cron
- Remove DayOfWeek alias 7 to DayOfWeek 0 to stick to standard cron
- Fix DOW ranges calculations when lastday is a Sunday
- Fix overflow on 32bits systems
- Fix python2 testing
- Modernize packaging
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
