revert dark modal headers to light, closes #277
yeti: prevent override on input size, closes #282
readable: add navbar border, closes #278
add grunt watch task, closes #281
simplex: use open sans, tweak styles
cosmo: use source sans pro, tweak styles
cyborg: use droid sans, tweak font size
update thumbnails
Merge remote-tracking branch 'upstream/gh-pages' into automatic-swatch-discovery