Fix PHP 5.3.0+ compatibility.

Prior to PHP 5.4, the language did not support array dereferencing method call results (See: http://php.net/manual/en/language.types.array.php#example-102). This modification introduces the use of a temporary variable to store the result of a call to the `getStartTimes12Hour` method, thus making it compatible with PHP 5.3.0+
Fix PHP 5.3.0 compatibility

Ugh, too early. :-) Fix a typo in my proposed PHP 5.3.0+ compatibility update.
Merge pull request #7 from mark-cr/patch-1

Patch 1