Added data param attribute parser

[Shin1gami]

A little feature that allows to pass custom params to load function via data attributes.
All you have to do is to add data-param-something="somebody" to your element.

For example:
<div class="skip-export kv-expanded-row" data-key="15827" data-index="1" data-param-cat="145" data-param-dog="770"></div>
This will create a POST request with parameters:

cat 145
dog 770
expandRowInd    1
expandRowKey    15827