color-stop() not supported in mozilla gradients

updated docs to fix inconsistent display of code elements, update scaffolding to fix padding issue on fluid containers, add placeholder hero unit in patterns for future use, continue to refactor some rgba to hex values

Fixed a couple of missing parentheses.

adding more details on browser support, adding snippet of about text, changed p tags to have half the bottom margin

Serif font stack defaults to sans-serif font

Give docs page some ellipsis and apostrophe love

adding o/ms gradient and unprefixed one