calendar 5.x-2.6

Version 5.2.6
===============

- #349265 Fix broken logic when display unlimited events option was used.
- #344789 Block view was wrong when displayed on 'week' view of calendar.
- #372771 Don't add empty day div to mini calendar.
- #369573 Fix jCalendar popup when used without clean urls.
- #310633 Rework 'all day' logic to correctly handle increments.
- #342932 Fix broken ical export, only the day export was working correctly.
- #336018 Add Dutch translation.
- Fix the calendar date selector so it works correctly as a select list when the Date Popup module is turned off.
- #336533 Make sure overridden calendar view info is not overridden by default info.
- #327221 Don't add 'today' class in empty blocks.