Add option childrenRenderer

[zhang-z]

May solve issue #31 , #45

Usage example:

<InfiniteScroll ...
  childrenRenderer={(children) => (<table>{children}</table>)} >
  {listItems}
</InfiniteScroll>

[geminiyellow]

@garetht how about this pr ?

[pplewa]

This is exactly what I need, being able to group displayable elements. How can I help to push this forward @garetht ?

[sesteva]

+1 on merging this PR. I have forked and tested locally and it works as expected

[Doff3n]

+1

[bleurubin]

+1

edit: n/m i get it, the entire thing is wrapped in a table so you can render whatever you like...