Groups generation bug

[nicolasgoutaland]

Hi,
Did just find a bug in groups generation.
Actual implementation stop groups generation once groups count limit is reached, but this will also stop sublayers content generation, merging them all in a master layer.
This issue is fixed in PR #20 .

By the way, i think a layer grouping model based on views type would be more practical (Tableview, ScrollView, Cell, etc....) what do you think ?

Regards