Eagle BRD widget updated today, following are the enhancements/fixes in version 5.2:

ameen.nihad · January 6, 2017, 7:03pm

Holes and holes of elements are now supported.
Large holes can be milled with same bit that cuts board dimension.
Fix a bug in rendering board dimensions when they are not listed in the right order in .brd file.
Curved board dimensions are now supported.
PCB Holders (tabs), this has some bugs, it can be turned off by setting the hold count parameter to zero.

Update are live on tinyg/grbl workspaces.

jlauer · January 6, 2017, 7:15pm

Huge update @ameen.nihad . We all owe you big time for these enhancements/fixes. This widget is getting amazing now with your help. I also want to mention that @raykholo 's work on switching board layers has now come to fruition with the ability to flip that Ameen added. This widget is a true result of open source contributions now.

Frank_Herrmann · January 7, 2017, 9:00am

@ameen.nihad can u short explain which problem is happend with the tab feature. Btw, great work!

ameen.nihad · January 7, 2017, 9:16am

@Frank_Herrmann I explained the problem in details on github (issue # 16).
I’m planning to do further updates to how dimensions are rendered, I will add support for multiple boards in single Eagle file, and possibly support for inner dimensions, I will tackle the holders issue with with that update because it’s related to board dimensions.