Add support to PHP5.5 since it has been released.

Signed-off-by: crynobone <crynobone@gmail.com>
Fix bug in Auth::loginById that caused no action to be taken. Closes #1712.
Merge pull request #1709 from crynobone/feature/php5.5

Add support test PHP 5.5 (using Travis-CI) since it has been released.
Fix nested before filters in groups.
Fix double get on cache remember.