Hi Allan,
Actually, I am not an expert in javascript.
Hence, the code quality may not be as per your expectations :)
but some how I have managed to implement add dynamic col/row into the datatable
and inline editing
http://jsfiddle.net/4nil/zq7j97c4/
please let me know in case of any major changes.
Hope this help others!!!
Thanks for your kind and continuous support!