replace use of serialize functions with json
Merge pull request #4 from rojblake/serialize_fix

replace use of serialize functions with json
replace use of serialize functions with json
Merge commit '0078e4449e0e7c6670dc3d354b3d1ea3496d9419' into release-1.3
replaced un/serialize method by json_en/decode
Update User.php

Added parameter to retrieve an array
Update SecurityUtil.php