V7 public methods

[igoriok1994]

Hi,

Now in V7 only few public methods are available: scrollToRow, scrollToColumn, selectCell...

I think it would be useful to have getters for grid ref (html element), column metrics and maybe some other data (such as widths, heights and other...)

[igoriok1994]

Up

[nstepien]

The grid element is accessible via the ref object.
I don't think we'll add more as we don't want to have too many APIs to support.