- Fixed problems with lone years in strtotime().
- Added functions to timelib to get a list of all abbreviations and timezone
identifiers.
- Fixed problems with parsed dates that only have GMT offsets associated
with them.
- Fixed a Windows compile problem.
- Added special constants for different often used date formats (DATE_ISO8601,
DATE_RFC822, DATE_RSS etc).
- Fixed date_default_timezone_get() to return the guessed timezone if none
was set yet with date_default_timezone_set().
- Added experimental support for Date/Timezone objects as per specifications.
