Clean CSS & align w/ site output
Clean CSS & align w/ site output

Squashed commits:
[2f7c6bb] Lint CSS: merge rules, sort properties
[39381e8] Remove redundant CSS rules & properties
[ebd7394] Run CSScomb to format CSS consistently
[321b8b6] Align text color, titles & visited links w/ site
[1a5f1bc] Align heading & link colors w/ site output

dita-ot/docs,shaneataylor/docs,shaneataylor/docs,infotexture/docs,infotexture/docs