[Bf-committers] Layer system code

[David Bryant]

I had a thought this morning.
What if Groups had visibility toggles(visible/invisible).
Then even with the 20 standard layers which can be named,groups (which 
already can be named) can act as sublayers as well.Thus removing the need 
for a total revamp of the layer system and giving additional theoretically 
more pseudo layers.One additional benifit is that it will fit easier with 
the 2.5 recode project with minimal effort.

I'm going to toy around with the codebase this week and test it out.But, let 
me know what you think.

Digikiller