Location of compiled CSS

[btfou]

As per discussion in dojo/themes#9, where should the compiled CSS be located?

1. Compile in place like dgrid (current structure).
2. A dist directory for the the entire repo, e.g. themes\dist\flat.
3. A dist directory in each theme, e.g. themes\flat\dist\.

@wkeese @kfranqueiro @dylans I'll act on consensus. I'm not sure what the plan is to include in 1.11. Perhaps we can have that discussion and it may influence the decision.

[wkeese]

I guess a dist directory for the project is good but I really don't care one way or another.

[dylans]

I think compile in place is simplest from a path and comprehension perspective, and since there really aren't that many files, I'd be ok with that. But I'm open to revisiting this for 1.12.