rendering fixes [0.5.2]

This version introduces multiple enhancements:

fixed error with caching data all the time
fixed grid rendering

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

Added:      /Lib/Core/Render/View/Grid/Row.php
            -- Added --
                to render single row

Modified:   /Lib/Core/Render/View/Abstract.php
            -- Updated --
                render, fixed name of option to check that cache for data is enabled

Modified:   /Lib/Core/Render/View/Grid/Abstract.php
            -- Updated --
                render, changed class to render single row, added some options

Modified:   /Lib/Core/Render/etc/config.ini
            -- Modified --
                changed version from 0.5.1 to 0.5.2