Updated Baseline grid calculations

- Defaulting to a halved baseline grid approach.

- Tightened the tolerances for ⅓ baseline qualifications.
Fixed List baseline alignment
Tab style tweaks
Fixed box baseline issues
Removed text legibility from most tags

- Removed optimize legibility from p, ul, ol, dd, and menu tags because
it can cause crashes and other oddities.
Hosted page style tweaks

These commits only apply to the github pages styling. Totally optional
commits.

- Made Open Sans the font of choice for a few items.

- Made modularly scaled typography use absolute values.

- Some baseline and border fixes.