There were some problems when creating a year-only date using the select filter caused by trying to create a date with zeros in the month and day. Fix the date building logic to force a valid month and day into them.

Issue #1054458: Move date_increment_round() function into Date API module so it is always available.

Issue #1013662 by developer-x: Remove check for start and end date - this prevented multiday-all day events from showing 'All Day'

Check for empty values as well as missing values for better performance in the Views exposed widgets.

Invalid or empty dates need to replace the form array with an empty string. Also removing some code from date_api_sql that actually doesn't do anything.

Add some error trapping in case the parent dateObject is unable to make a date out of a string to avoid showing the user errors.

As long as I'm already moving all these files around, get all the views handling into its own module.

A partial date value array still must create a full ISO date or date_create() will not work correctly.