zend integration (composer)

This version introduces multiple enhancements:

added zend libraries to composer json file

Details of additions/deletions below:
--------------------------------------------------------------

Modified:   composer.json
            -- Updated --
                added zend libraries
Merge remote-tracking branch 'origin/master' into zend2-integration
empty host error [0.13.1]

This version introduces multiple enhancements:

fixed error when host value is empty

Details of additions/deletions below:
--------------------------------------------------------------

Modified:   Lib/Core/Db/Helper/Connection/Mysql.php
            -- Updated --
                __construct added checking host value

Modified:   Lib/Core/Db/Helper/Connection/Pdo.php
            -- Updated --
                __construct added checking host value

Modified:   Lib/Core/Db/etc/config.ini
            -- Modified --
                changed version from 0.13.0 to 0.13.1