calender()

Hello,

I have a question about codeigniter 3.x -->  I am reading the description there are calender( ) and tablesorter( ).

I wonder why there are no manuals on how to use the function ?

http://www.codeigniter.com/user_guide/li....html#id22

Is it still under construction ?

When will it be launch ?  Am I able to request new features if I need it ? 

Has codeigniter 3.x be stable ?  What version is underconstruction ?  3.x or 4.0 ?

Thanks in advance.

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