calendar 6.x-2.0-rc4

- Change the jcalendar code to use the new display_ids.
- Make it possible to expose the calendar parts in the UI. To make this work better, combine year, month, day, and week handlers into a single handler.
- #311485 Make sure mini calendar has the right number of columns if using week number.
- #317660 Hard code line feeds in ical export to be sure they come through correctly in all systems.
- Start adding in Advanced help for the calendar.
- Move the colorpicker js info to the plugin so it isn't loaded everywhere.
- #314682 Add missing url() in jcalendar js code.
- #315955 Translation cleanup.
- Get colorpicker working in the Views UI again. I'm not loading the js in the best place, but at least it works now.
- Get rid of deprecated theme for ical output that is not being used in current code.
- #307544 Get rid of extra line feed at end of ical description and make sure template works correctly.
- #312170 Fix misplaced parenthesis in jCalendar theme.
- #313161 Use date_id as iCal UID to be sure it is unique.
- #303537 Display:relative should be position:relative.
- #313538 Fix color typo in calendar.css.
- #309608, #309253 Get rid of attempt to simplify the navigation query, it is too easily broken.
- #309391 Now that the Views fatal error for missing display handlers is fixed, add the ical display back.