Add `allowEmpty` option to \Phalcon\Mvc\Model\Validator\*
Regenerated build files [ci skip]
Merge pull request #2440 from ovr/1.3.2_build

1.3.2 build
T2414 - Removed if statement in the session adapter that was causing a segfault with DBG
Regenerated build files
Merge pull request #2454 from niden/1.3.2

T2414 - Removed check for DBG in session/adapter
Merge pull request #2247 from dreamsxin/validator_allowempty

Add `allowEmpty` option to \Phalcon\Mvc\Model\Validator\*
Merge