Allowing 'reference timezones' for freebusy reports and other places.
Reference timezone to expander and recurrence iterator.
Testing reference timezone in recurrence expansion.
Merge branch '3.3' into freebusy-tz
Updated changelog.
Updated changelog.
Typo
Tests for Property\ICalendar\DateTime
Reference timezone testing in freebusy generator.

Also cleaned up the unittest a bit.
Keep forgetting PHP 5.3
Another PHP 5.3 issue.
Merge pull request #159 from fruux/freebusy-tz

Reference timezone support for expanding events and freebusy generation.
Merge branch '3.3'

Conflicts:
	lib/Component/VCalendar.php
	lib/DateTimeParser.php
	lib/FreeBusyGenerator.php
	lib/Property/ICalendar/DateTime.php
	lib/Recur/EventIterator.php
	tests/VObject/FreeBusyGeneratorTest.php