Scope variables to mixins instead of using globals

[bensmithett]

Global variables are kinda the Sass way. I'd like to try scoping every single variable with mixins, then explicitly include them where required.

=colors
  $green: #0f0

.some-module
  +colors
  color: $green

I wonder if there needs to be some distinction in the project structure between mixins that just import variables and those that actually generate CSS.

[bensmithett]

Nah, this will be done better in #6