Add separators for every N-variable columns

[ovidiuch]

Need

A common usecase is to group N columns into a page or a section entity (see Win8 dashboard)

Deliverables

• The jQuery script will receive the options columnsPerGroup (defaults to false) and groupSeparatorWidth (defaults to 50) and will render the grid accordingly. The latter option is ignored if the former is undefined.

Solution

This needs to be approached in two places:

1. When the positioning is calculated based on agnostic grid coords.
2. When calculating the closest grid position on drag

[nicholoyd]

@skidding, what do you think about this?
it makes sense to me.

[nicholoyd]

meant what do you think about ETAs?

[ovidiuch]

@nicholoyd can't provide an exact ETA but it's coming and I'll personally let you know :) - gonna close this issue now as it's going to be part of a bigger feature