angular-ui/ng-grid — pull request #1545 by jpuri (2014-09-17 18:52:29+00:00)
Title: subgrid feature

A couple of things to mention:

1. Changes in core are mostly those that are done to fix scrolling to use row.height instead of gridOption.rowHeight.
2. Row headers column currently do not have column header. This is issue with row header functionality that needs to be fixed.