Allow query params to be specified during refresh

When refreshing remote data, it may be required to optionally refresh with query params. Granted the data-query-params attribute is available, this function is not in the scope of the selected row, thus any row-specific data that might be used as a query param is not available.
Updated documentation for queryparams example
Merge pull request #367 from tristanlee85/master

Allow query params to be specified during refresh