try fix proposed by NIXin (nixin)
update tests, deprecate methods
reworked Date_Helper to use DateTime class instead of PEAR Date
rip out completely PEAR Date class, use PHP DateTime instead
polish out bad getUnixTimestamp usage, rip out getCurrentUnixTimestampGMT
allow hhvm fail in travis
@phpdoc fixes
Merge pull request #5 from glensc/bug-684907

get rid of PEAR Date, launchpad bug 684907