catch PDOException
improvements
correct docblock
Fixed hhvm build for laravel/framework

Signed-off-by: crynobone <crynobone@gmail.com>
Merge pull request #3011 from crynobone/fix/travis

Fixed hhvm build for laravel/framework
Merge pull request #3007 from anlutro-pull-requests/queryexception

QueryException improvements
Merge branch '4.1'