Use the `eachDay` option in the other-months demo.
Fix handling of `extraClasses` property, split on space.

This is specifically for multi month pickers. This makes the assumption that
the keyboard is always interacting with the first month in a multi month
calendar. The next step is to store which grid currently has focus and to base
the focus logic off of that.

* Re-add `ui-datepicker-week-col` class name currently used.
* Add test suite.
* Support changing option after initialization.

Move methods to prototype.

Make `select()` a private method as it's not part of the specification.

Revert to old behavior with two instead of three chars.
Fixes layout issue with wrong day table cell width.

Change status caching, fix existing value related methods, introduce
$.date construction with date object, selected property is null by
default, add selected getter

This reverts commit ea986f2.

Fix travis unit test issue due to timezone difference.

Workaround has been removed when merged with master.
This commit adds the proper dependency again to fix the tests.

# Conflicts:
#	ui/i18n/datepicker-sv.js
#	ui/widgets/datepicker.js

# Conflicts:
#	ui/i18n/datepicker-pt.js