INTERVAL not included in to_ical method

[masqita]

The Validations::DailyInterval, Validations::MonthlyInterval, … modules don't include the "INTERVAL" property in their build_ical method, simply ignoring it when building the iCalendar compliant rule.

IceCube::Rule.daily(3).count(5).to_ical

=> "FREQ=DAILY;COUNT=5"

Should be:

=> "FREQ=DAILY;COUNT=5;INTERVAL=3"

[seejohnrun]

Fixed and released as part of 0.7.9
Thanks for the report