QDateTime constructor buggy

[vakopian]

As discussed in  http://qcu.be/content/qdatetime-timezone-issue

	$strTime = '2005-05-05T11:05:24+0700';
	print $strTime."\n";
	// show that DateTime handles everything correctly
	$y = new Datetime($strTime);
	print $y->format(DateTime::ISO8601)." - DateTime\n";
	// and QDateTime fails miserably
	$x = new QDatetime($strTime);
	print $x->format(DateTime::ISO8601)." - QDateTime\n";

This produces
<code>
2005-05-05T11:05:24+0700
2005-05-05T11:05:24+0700 - DateTime?
2005-05-04T21:05:24-0700 - QDateTime
</code>

[vakopian]

Well, I still don't understand what is it that QDateTime tries to handle in that horrible block (lines 163-190), and I still don't know what's this mysterious comment referring to on line 178:

// To deal with "Tues" and date skipping bug in PHP 5.2

But I think I have a fix for the bug above.
Please test/review.

[vakopian]

(In [1417]) Fixes #775