Update CSSDoc
Add $P_primary, $P_secondary

I considered giving these different names specific to the role,
but as I work with this stuff more, it seems like it might be a
bad idea going forward.

Reasons why:
- we might end up with a profusion of widget-specific padding
  variables.
- we can get a lot of permutations out of two basic baseline
  multiples and multiple-and-a-half of 12 and 16, so we can
  use inline sass math to get custom variants on either the
  primary or secondary baseline grid.
Deprecate $P_touchListItem in favor of $P_secondary
Deprecate $P_figuresetGap in favor of $P_secondary
Remove $P_textInput => $P_secondary
Compile.
Merge pull request #93 from meetup/reorganize_dimension_vars_83

Reorganize dimension vars 83