Show cell value on mouseover via "title" attribute

Some cell values are too long and some of that value is hidden after ellipsis (...). Sometimes it is not possible to see the cell contents completely. So, please show cell contents on mouseover via "title" attribute or find a better solution. Thanks!

My suggestion:

```javascript
$templateCache.put("cellTemplate.html",
    //"<div class=\"ngCellText\" ng-class=\"col.colIndex()\"><span ng-cell-text>{{COL_FIELD CUSTOM_FILTERS}}</span></div>"
	"<div class=\"ngCellText\" ng-class=\"col.colIndex()\"><span ng-cell-text title=\"{{COL_FIELD CUSTOM_FILTERS}}\">{{COL_FIELD CUSTOM_FILTERS}}</span></div>"
  );
```